# Patent

## Title
Compositions based on 2,3,3,4,4,4-hexafluorobut-1-ene

## Abstract

A composition including 2,3,3,4,4,4-hexafluorobut-1-ene as a mixture with one or more hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compounds having a boiling point of less than or equal to 0° C. Also, the use of such a composition in heat transfer applications. Also, a heat transfer installation including a vapor compression circuit containing such a composition as heat-transfer fluid or containing a heat-transfer composition including such a composition, and also one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof.

## Background
FIELD OF THE INVENTION
The present invention relates to compositions based on 2,3,3,4,4,4-hexafluorobut-1-ene, and also to their use especially as heat-transfer fluids.
TECHNICAL BACKGROUND
Fluids based on fluorocarbon compounds are widely used in vapor-compression heat-transfer systems, especially air-conditioning, heat pump, refrigeration or freezing devices. The common feature of these devices is that they are based on a thermodynamic cycle comprising vaporization of fluid at low pressure (in which the fluid absorbs heat); the compression of the vaporized fluid up to a high pressure; the condensation of the vaporized fluid to liquid at high pressure (in which the fluid expels heat); and the depressurization of the fluid to complete the cycle.
The choice of a heat-transfer fluid (which may be a pure compound or a mixture of compounds) is dictated firstly by the thermodynamic properties of the fluid, and secondly by additional constraints. Thus, a particularly important criterion is that of the impact of the fluid under consideration on the environment. In particular, chlorinated compounds (chlorofluorocarbons and hydrochlorofluorocarbons) have the drawback of damaging the ozone layer. Non-chlorinated compounds such as hydrofluorocarbons, fluoro ethers and fluoroolefins are thus now generally preferred.
It is, however, necessary to develop other heat-transfer fluids that have a lower global warming potential (GWP) than that of the heat-transfer fluids currently used, and which have equivalent or improved performance qualities.
Document US 2009/0 143 604 describes processes for manufacturing fluoro alkanols and fluoroolefins. The synthesis of 2,3,3,4,4,4-hexafluorobut-1-ene (HFO-1336yf) is especially disclosed.
Document WO 2009/085 937 describes a secondary cooling loop system for an air conditioning system. Among the heat-transfer compounds that may be used is HFO-1336yf.
Document US 2009/0 302 264 describes heat-transfer compositions comprising a heat-transfer fluid, a lubricant and an acidic deactivator. HFO-1336yf is cited among the possible heat-transfer fluids.
Document US 2011/0 088 418 describes compositions comprising an ionic liquid and a fluoroolefin, which are useful for heat-transfer applications with absorption systems. HFO-1336yf is cited as an example of a fluoroolefin.
However, there is still a need to develop other heat-transfer fluids that have a relatively low GWP, and that are capable of replacing the usual heat-transfer fluids.
In particular, it is desirable to develop other low-GWP heat-transfer fluids that are quasi-azeotropic and/or that have good energy performance qualities when compared with the usual heat-transfer fluids (such as isobutane) and/or energy performance qualities that are better than those of the known low-GWP heat-transfer fluids.
SUMMARY OF THE INVENTION
The invention relates first to a composition comprising 2,3,3,4,4,4-hexafluorobut-1-ene as a mixture with one or more hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compounds with a boiling point of less than or equal to 0° C.
According to one embodiment, the composition consists of a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene and of one or more hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compounds with a boiling point of less than or equal to 0° C.
According to one embodiment, the composition is a binary mixture of compounds; or is a ternary mixture of compounds.
According to one embodiment, the composition is a binary mixture of 2,3,3,4,4,4-hexafluorobut-1-ene with a hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compound with a boiling point of less than or equal to 0° C.; or is a ternary mixture of 2,3,3,4,4,4-hexafluorobut-1-ene with a first hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compound with a boiling point of less than or equal to 0° C. and with a second hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compound with a boiling point of less than or equal to 0° C.
According to one embodiment, the hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compound(s) with a boiling point of less than or equal to 0° C. have a boiling point of less than or equal to −5° C. and preferably less than or equal to −10° C.
According to one embodiment, the hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compound(s) with a boiling point of less than or equal to 0° C. are chosen from 1,3,3,3-tetrafluoropropene, 2,3,3,3-tetrafluoropropene, 1,1,3,3-tetrafluoropropene, 3,3,3-trifluoropropene, 2,3,3-trifluoropropene, 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, pentafluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1-difluoroethane, 1,1,1-trifluoropropane, isobutane and propane, and mixtures thereof.
According to one embodiment, the hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compound(s) with a boiling point of less than or equal to 0° C. are chosen from 1,3,3,3-tetrafluoropropene, 2,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1-difluoroethane and 1,1,1-trifluoropropane, and mixtures thereof.
According to one embodiment, the composition comprises or preferably consists of:

    
    
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene and 1,3,3,3-tetrafluoropropene; or
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene and 1,1,1-trifluoropropane; or
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene and 1,1,2,2-tetrafluoroethane; or
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene and 1,1,1,2-tetrafluoroethane; or
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene and 1,1-difluoroethane; or
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene, 1,1,1,2-tetrafluoroethane and 1,3,3,3-tetrafluoropropene; or
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene, 1,1,1,2-tetrafluoroethane and 1,1,1-trifluoropropane;
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene, 1,1,1,2-tetrafluoroethane and 1,1-difluoroethane.
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene, 1,1,2,2-tetrafluoroethane and 1,3,3,3-tetrafluoropropene; or
        a mixture of 2,3,3,4,4,4-hexafluorobut-1-ene, 1,1,2,2-tetrafluoroethane and 1,1,1-trifluoropropane.
    
    


According to one embodiment, the difference between the liquid saturation pressure and the vapor saturation pressure at a temperature of −5° C. is less than or equal to 10% of the liquid saturation pressure.
According to one embodiment, the composition is non-flammable.
The invention also relates to the use of the abovementioned composition as a heat-transfer fluid.
The invention also relates to a heat-transfer composition, comprising the abovementioned composition as heat-transfer fluid, and also to one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorant agents and solubilizers, and mixtures thereof.
The invention also relates to a heat-transfer installation comprising a vapor compression circuit containing a composition as described above as heat-transfer fluid or containing a heat-transfer composition as described above.
According to one embodiment, the installation is chosen from mobile or stationary heat-pump heating, air-conditioning, refrigeration, freezing and Rankine cycle installations, and is preferably a container refrigeration installation.
The invention also relates to a process for heating or cooling a fluid or a body by means of a vapor compression circuit containing a heat-transfer fluid, the said process comprising, successively, evaporation of the heat-transfer fluid, compression of the heat-transfer fluid, condensation of the heat fluid and depressurization of the heat-transfer fluid, in which the heat-transfer fluid is a composition as described above.
According to one embodiment, this process is a process for cooling a fluid or a body, in which the temperature of the cooled fluid or body is from −15° C. to 15° C., preferably from −10° C. to 10° C. and more particularly preferably from −5° C. to 5° C.; or is a process for heating a fluid or a body, in which the temperature of the heated fluid or body is from 30° C. to 90° C., preferably from 35° C. to 60° C. and more particularly preferably from 40° C. to 50° C.
The invention also relates to a process for reducing the environmental impact of a heat-transfer installation comprising a vapor compression circuit containing an initial heat-transfer fluid, the said process comprising a step of replacing the initial heat-transfer fluid in the vapor compression circuit with a final transfer fluid, the final transfer fluid having a GWP lower than that of the initial heat-transfer fluid, in which the final heat-transfer fluid is a composition as described above.
The present invention makes it possible to overcome the drawbacks of the prior art. It more particularly provides low-GWP heat-transfer fluids, which can replace the usual heat-transfer fluids.
In particular, in certain embodiments, the invention provides quasi-azeotropic heat-transfer fluids. In certain embodiments, the invention provides heat-transfer fluids which have good energy performance qualities (especially volumetric capacity and/or coefficient of performance) when compared with usual heat-transfer fluids and/or which have improved energy performance qualities when compared with the known low-GWP heat-transfer fluids.
This is accomplished by means of mixtures comprising, firstly, HFO-1336yf, and, secondly, at least one hydrocarbon, hydrofluorocarbon or fluoroolefin compound with a boiling point of less than or equal to 0° C. and preferably less than or equal to −10° C., which is chosen in particular from the list of compounds mentioned above.
Mixtures comprising compounds with a low boiling point have an improved volumetric capacity when compared with HFO-1336yf alone. The increase in the volumetric capacity of a composition allows the use of compressors with a smaller swept volume, and consequently a smaller size.


DESCRIPTION OF EMBODIMENTS OF THE INVENTION
The invention is now described in greater detail and in a nonlimiting manner in the description that follows.
The main compounds used in the context of the invention are noted as follows:

    
    
        2,3,3,4,4,4-hexafluorobut-1-ene: HFO-1336yf;
        1,3,3,3-tetrafluoropropene: HFO-1234ze;
        2,3,3,3-tetrafluoropropene: HFO-1234yf;
        1,1,3,3-tetrafluoropropene: HFO-1234zc;
        3,3,3-trifluoropropene: HFO-1243zf;
        2,3,3-trifluoropropene: HFO-1243yf;
        1,1,1,2-tetrafluoroethane: HFC-134a;
        1,1,2,2-tetrafluoroethane: HFC-134;
        pentafluoroethane: HFC-125;
        1,1,1,2,3,3,3-heptafluoropropane: HFC-227ea;
        1,1-difluoroethane: HFC-152a;
        1,1,1-trifluoropropane: HFC-263fb;
        propane: HC-290;
        isobutane: HC-600a.
    
    


Unless otherwise mentioned, throughout the patent application, the proportions of compounds indicated are given as mass percentages.
HFO-1234ze may be in cis or trans form or may be a mixture of these two forms. Preferably, it is in trans form (E).
According to the present patent application, the global warming potential (GWP) is defined relative to carbon dioxide and relative to a duration of 100 years, according to the method indicated in “The scientific assessment of ozone depletion, 2002, a report of the World Meteorological Association's Global Ozone Research and Monitoring Project”.
The term “heat-transfer compound” or, respectively, “heat-transfer fluid” (or cold-generating fluid) means a compound or, respectively, a fluid that is capable of absorbing heat by evaporating at low temperature and low pressure and of expelling heat by condensing at high temperature and high pressure, in a vapor compression circuit. In general, a heat-transfer fluid may comprise one, two, three or more than three heat-transfer compounds.
The term “heat-transfer composition” means a composition comprising a heat-transfer fluid and optionally one or more additives that are not heat-transfer compounds for the intended application.
The additives may be chosen especially from lubricants, nanoparticles, stabilizers, surfactants, tracers, fluorescers, odorant agents and solubilizers.
The stabilizer(s), when they are present, preferably represent not more than 5% by mass in the heat-transfer composition. Among the stabilizers, mention may be made especially of nitromethane, ascorbic acid, terephthalic acid, azoles such as tolutriazole or benzotriazole, phenolic compounds such as tocopherol, hydroquinone, t-butyl hydroquinone, 2,6-di-tert-butyl-4-methylphenol, epoxides (optionally fluorinated or perfluorinated alkyl or alkenyl or aromatic) such as n-butyl glycidyl ether, hexanediol diglycidyl ether, allyl glycidyl ether, butylphenylglycidyl ether, phosphites, phosphonates, thiols and lactones.
Lubricants that may especially be used include oils of mineral origin, silicone oils, paraffins of natural origin, naphthenes, synthetic paraffins, alkylbenzenes, poly-α-olefins, polyalkene glycols, polyol esters and/or polyvinyl ethers.
Nanoparticles that may especially be used include carbon nanoparticles, metal oxides (of copper or aluminum), TiO2, Al2O3, MoS2, etc.
As tracers (which can be detected), mention may be made of deuterated or non-deuterated hydrofluorocarbons, deuterated hydrocarbons, perfluorocarbons, fluoroethers, brominated compounds, iodinated compounds, alcohols, aldehydes, ketones, nitrous oxide and combinations thereof. The tracer is different from the heat-transfer compound(s) of which the heat-transfer fluid is composed.
Solubilizers that may be mentioned include hydrocarbons, dimethyl ether, polyoxyalkylene ethers, amides, ketones, nitriles, chlorocarbons, esters, lactones, aryl ethers, fluoroethers and 1,1,1-trifluoroalkanes. The solubilizer is different from the heat-transfer compound(s) of which the heat-transfer fluid is composed.
Fluorescers that may be mentioned include naphthalimides, perylenes, coumarins, anthracenes, phenanthracenes, xanthenes, thioxanthenes, naphthoxanthenes, fluoresceins and derivatives and combinations thereof.
Odorous agents that may be mentioned include alkyl acrylates, allyl acrylates, acrylic acids, acryl esters, alkyl ethers, alkyl esters, alkynes, aldehydes, thiols, thioethers, disulfides, allyl isothiocyanates, alkanoic acids, amines, norbornenes, norbornene derivatives, cyclohexene, heterocyclic aromatic compounds, ascaridole, o-methoxy(methyl)phenol and combinations thereof.
The heat-transfer process according to the invention is based on the use of an installation comprising a vapor compression circuit which contains a heat-transfer fluid. The heat-transfer process may be a process of heating or cooling a fluid or a body.
The vapor compression circuit containing a heat-transfer fluid comprises at least one evaporator, a compressor, a condenser and a depressurizer, and also lines for transporting heat-transfer fluid between these elements. The evaporator and the condenser comprise a heat exchanger for exchanging heat between the heat-transfer fluid and another fluid or body.
Compressors that may especially be used include a centrifugal compressor with one or more stages or a mini centrifugal compressor. Rotary, spiral, piston or screw compressors may also be used. The compressor may be driven by an electric motor or by a gas turbine (for example fed with the exhaust gas from a vehicle, for mobile applications) or by gearing.
The installation may comprise a turbine for generating electricity (Rankine cycle).
The installation may optionally also comprise at least one heat-transfer fluid used to transmit heat (with or without a change of state) between the heat-transfer fluid circuit and the fluid or body to be heated or cooled.
The installation may also optionally comprise two (or more) vapor compression circuits, containing identical or different heat-transfer fluids. For example, the vapor compression circuits may be coupled together.
The vapor compression circuit functions according to a standard vapor compression cycle. The cycle comprises the change of state of the heat-transfer fluid from a liquid phase (or liquid/vapor double phase) to a vapor phase at relatively low pressure, and then the compression of the fluid in the vapor phase up to a relatively high pressure, the change of state (condensation) of the heat-transfer fluid from the vapor phase to the liquid phase at a relatively high pressure, and the reduction of the pressure to recommence the cycle.
In the case of a cooling process, heat derived from the fluid or body that is being cooled (directly or indirectly, via a heat-transfer fluid) is absorbed by the heat-transfer fluid, during its evaporation, and at a relatively low temperature relative to the environment. The cooling processes comprise air-conditioning (with mobile installations, for example in vehicles, or stationary installations), refrigeration (with mobile installations, for example in containers, or stationary installations) and freezing or cryogenic processes.
In the case of a heating process, heat is surrendered (directly or indirectly, via a heat-transfer fluid) from the heat-transfer fluid, during its condensation, to the fluid or body that is heated, at a relatively high temperature relative to the environment. The installation for performing the heat transfer is referred to in this case as a “heat pump”.
It is possible to use any type of heat exchanger for the use of the heat-transfer fluids according to the invention, and especially co-current heat exchangers or, preferably, counter-current heat exchangers.
The heat-transfer fluids used in the context of the present invention are compositions which comprise HFO-1336yf in combination with at least one hydrocarbon, ether, hydrofluoroether, hydrofluorocarbon or fluoroolefin compound (preferably a hydrofluorocarbon, hydrocarbon or fluoroolefin compound) with a boiling point of less than or equal to −10° C. at a pressure of 101.325 kPa.
The boiling point may be measured according to standard NF EN 378-1 of April 2008.
Preferably, the compound is chosen from HFO-1234yf, HFO-1234ze, HFO-1234zc, HFO-1243zf, HFO-1243yf, HFC-134a, HFC-134, HFC-125, HFC-227ea, HFC-152a, HFC-263fb, HC-290 and HC-600a.
HFO-1234ze, HFO-1234yf, HFC-134a, HFC-134, HFC-263fb and HFC-152a are preferred among these compounds.
The normal boiling points at 1 bar of these compounds are as follows, to within 0.5° C.:

    
    
        HFO-1234ze: −18.5° C.;
        HFO-1234yf: −29.5° C.;
        HFC-134a: −26° C.;
        HFC-134: −17.5° C.;
        HFC-263fb: −13.0° C.;
        HFC-152a: −24.0° C.
    
    


In particular, the above compositions may be binary or ternary mixtures of compounds.
Binary mixtures are mixtures of two heat-transfer compounds. Ternary mixtures are mixtures of three heat-transfer compounds.
Impurities may or may not be present in such heat-transfer fluids. When they are present, they represent less than 1%, preferably less than 0.5%, preferably less than 0.1%, preferably less than 0.05% and preferably less than 0.01% of the composition.
In the case of the ternary mixtures, the heat-transfer fluid may comprise HFO-1336yf in combination with two compounds chosen from HFO-1234yf, HFO-1234ze, HFO-1234zc, HFO-1243zf, HFO-1243yf, HFC-134a, HFC-134, HFC-125, HFC-227ea, HFC-152a, HFC-263fb HC-290 and HC-600a; or alternatively HFO-1336yf in combination with a compound chosen from HFO-1234yf, HFO-1234ze, HFO-1234zc, HFO-1243zf, HFO-1243yf, HFC-134a, HFC-134, HFC-125, HFC-227ea, HFC-152a, HFC-263fb, HC-290 and HC-600a and also an additional compound, preferably chosen from hydrocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroethers, ethers (of hydrocarbons), fluoroolefins, ammonia and carbon dioxide.
In the above compositions, the HFO-1336yf may represent from 0.1% to 1% of the composition or from 1% to 2% of the composition; or from 2% to 3% of the composition; or from 3% to 4% of the composition; or from 4% to 5% of the composition; or from 5% to 6% of the composition; or from 6% to 7% of the composition; or from 7% to 8% of the composition; or from 8% to 9% of the composition; or from 9% to 10% of the composition; or from 10% to 11% of the composition; or from 11% to 12% of the composition; or from 12% to 13% of the composition; or from 13% to 14% of the composition; or from 14% to 15% of the composition; or from 15% to 16% of the composition; or from 16% to 17% of the composition; or from 17% to 18% of the composition; or from 18% to 19% of the composition; or from 19% to 20% of the composition; or from 20% to 21% of the composition; or from 21% to 22% of the composition; or from 22% to 23% of the composition; or from 23% to 24% of the composition; or from 24% to 25% of the composition; or from 25% to 26% of the composition; or from 26% to 27% of the composition; or from 27% to 28% of the composition; or from 28% to 29% of the composition; or from 29% to 30% of the composition; or from 30% to 31% of the composition; or from 31% to 32% of the composition; or from 32% to 33% of the composition; or from 33% to 34% of the composition; or from 34% to 35% of the composition; or from 35% to 36% of the composition; or from 36% to 37% of the composition; or from 37% to 38% of the composition; or from 38% to 39% of the composition; or from 39% to 40% of the composition; or from 40% to 41% of the composition; or from 41% to 42% of the composition; or from 42% to 43% of the composition; or from 43% to 44% of the composition; or from 44% to 45% of the composition; or from 45% to 46% of the composition; or from 46% to 47% of the composition; or from 47% to 48% of the composition; or from 48% to 49% of the composition; or from 49% to 50% of the composition; or from 50% to 51% of the composition; or from 51% to 52% of the composition; or from 52% to 53% of the composition; or from 53% to 54% of the composition; or from 54% to 55% of the composition; or from 55% to 56% of the composition; or from 56% to 57% of the composition; or from 57% to 58% of the composition; or from 58% to 59% of the composition; or from 59% to 60% of the composition; or from 60% to 61% of the composition; or from 61% to 62% of the composition; or from 62% to 63% of the composition; or from 63% to 64% of the composition; or from 64% to 65% of the composition; or from 65% to 66% of the composition; or from 66% to 67% of the composition; or from 67% to 68% of the composition; or from 68% to 69% of the composition; or from 69% to 70% of the composition; or from 70% to 71% of the composition; or from 71% to 72% of the composition; or from 72% to 73% of the composition; or from 73% to 74% of the composition; or from 74% to 75% of the composition; or from 75% to 76% of the composition; or from 76% to 77% of the composition; or from 77% to 78% of the composition; or from 78% to 79% of the composition; or from 79% to 80% of the composition; or from 80% to 81% of the composition; or from 81% to 82% of the composition; or from 82% to 83% of the composition; or from 83% to 84% of the composition; or from 84% to 85% of the composition; or from 85% to 86% of the composition; or from 86% to 87% of the composition; or from 87% to 88% of the composition; or from 88% to 89% of the composition; or from 89% to 90% of the composition; or from 90% to 91% of the composition; or from 91% to 92% of the composition; or from 92% to 93% of the composition; or from 93% to 94% of the composition; or from 94% to 95% of the composition; or from 95% to 96% of the composition; or from 96% to 97% of the composition; or from 97% to 98% of the composition; or from 98% to 99% of the composition; or from 99% to 99.9% of the composition. The content of HFO-1336yf may also vary within several of the above intervals: for example from 1% to 2% and from 2% to 3%, i.e. starting from 1% to 3%, etc.
Furthermore, in the above compositions, the or each hydrocarbon, ether, hydrofluoroether, hydrofluorocarbon or fluoroolefin compound with a boiling point of less than or equal to −10° C. may represent from 0.1% to 1% of the composition; or from 1% to 2% of the composition; or from 2% to 3% of the composition; or from 3% to 4% of the composition; or from 4% to 5% of the composition; or from 5% to 6% of the composition; or from 6% to 7% of the composition; or from 7% to 8% of the composition; or from 8% to 9% of the composition; or from 9% to 10% of the composition; or from 10% to 11% of the composition; or from 11% to 12% of the composition; or from 12% to 13% of the composition; or from 13% to 14% of the composition; or from 14% to 15% of the composition; or from 15% to 16% of the composition; or from 16% to 17% of the composition; or from 17% to 18% of the composition; or from 18% to 19% of the composition; or from 19% to 20% of the composition; or from 20% to 21% of the composition; or from 21% to 22% of the composition; or from 22% to 23% of the composition; or from 23% to 24% of the composition; or from 24% to 25% of the composition; or from 25% to 26% of the composition; or from 26% to 27% of the composition; or from 27% to 28% of the composition; or from 28% to 29% of the composition; or from 29% to 30% of the composition; or from 30% to 31% of the composition; or from 31% to 32% of the composition; or from 32% to 33% of the composition; or from 33% to 34% of the composition; or from 34% to 35% of the composition; or from 35% to 36% of the composition; or from 36% to 37% of the composition; or from 37% to 38% of the composition; or from 38% to 39% of the composition; or from 39% to 40% of the composition; or from 40% to 41% of the composition; or from 41% to 42% of the composition; or from 42% to 43% of the composition; or from 43% to 44% of the composition; or from 44% to 45% of the composition; or from 45% to 46% of the composition; or from 46% to 47% of the composition; or from 47% to 48% of the composition; or from 48% to 49% of the composition; or from 49% to 50% of the composition; or from 50% to 51% of the composition; or from 51% to 52% of the composition; or from 52% to 53% of the composition; or from 53% to 54% of the composition; or from 54% to 55% of the composition; or from 55% to 56% of the composition; or from 56% to 57% of the composition; or from 57% to 58% of the composition; or from 58% to 59% of the composition; or from 59% to 60% of the composition; or from 60% to 61% of the composition; or from 61% to 62% of the composition; or from 62% to 63% of the composition; or from 63% to 64% of the composition; or from 64% to 65% of the composition; or from 65% to 66% of the composition; or from 66% to 67% of the composition; or from 67% to 68% of the composition; or from 68% to 69% of the composition; or from 69% to 70% of the composition; or from 70% to 71% of the composition; or from 71% to 72% of the composition; or from 72% to 73% of the composition; or from 73% to 74% of the composition; or from 74% to 75% of the composition; or from 75% to 76% of the composition; or from 76% to 77% of the composition; or from 77% to 78% of the composition; or from 78% to 79% of the composition; or from 79% to 80% of the composition; or from 80% to 81% of the composition; or from 81% to 82% of the composition; or from 82% to 83% of the composition; or from 83% to 84% of the composition; or from 84% to 85% of the composition; or from 85% to 86% of the composition; or from 86% to 87% of the composition; or from 87% to 88% of the composition; or from 88% to 89% of the composition; or from 89% to 90% of the composition; or from 90% to 91% of the composition; or from 91% to 92% of the composition; or from 92% to 93% of the composition; or from 93% to 94% of the composition; or from 94% to 95% of the composition; or from 95% to 96% of the composition; or from 96% to 97% of the composition; or from 97% to 98% of the composition; or from 98% to 99% of the composition; or from 99% to 99.9% of the composition. The content of the compound or of each compound may also vary within several of the above intervals: for example from 1% to 2% and from 2% to 3%, i.e. from 1% to 3%, etc.
Preferred compositions are:

    
    
        the binary mixture of HFO-1336yf and HFO-1234ze (and especially HFO-E-1234ze);
        the binary mixture of HFO-1336yf and HFC-263fb;
        the binary mixture of HFO-1336yf and HFC-134;
        the binary mixture of HFO-1336yf and HFC-134a;
        the binary mixture of HFO-1336yf and HFC-152a;
        the ternary mixture of HFO-1336yf, de HFC-134a and HFO-1234ze (especially HFO-E-1234ze);
        the ternary mixture of HFO-1336yf, de HFC-134a and HFC-263fb;
        the ternary mixture of HFO-1336yf, de HFC-134a and HFC-152a;
        the ternary mixture of HFO-1336yf, de HFC-134 and HFO-1234ze (especially HFO-E-1234ze); et
        the ternary mixture of HFO-1336yf, de HFC-134 and HFC-263fb.
    
    


In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:














HFO-1336yf
HFO-1234ze




















Composition 1
from 1% to 5%
from 95% to 99%



Composition 2
from 5% to 10%
from 90% to 95%



Composition 3
from 10% to 15%
from 85% to 90%



Composition 4
from 15% to 20%
from 80% to 85%



Composition 5
from 20% to 25%
from 75% to 80%



Composition 6
from 25% to 30%
from 70% to 75%



Composition 7
from 30% to 35%
from 65% to 70%



Composition 8
from 35% to 40%
from 60% to 65%



Composition 9
from 40% to 45%
from 55% to 60%



Composition 10
from 45% to 50%
from 50% to 55%



Composition 11
from 50% to 55%
from 45% to 50%



Composition 12
from 55% to 60%
from 40% to 45%



Composition 13
from 60% to 65%
from 35% to 40%



Composition 14
from 65% to 70%
from 30% to 35%



Composition 15
from 70% to 75%
from 25% to 30%



Composition 16
from 75% to 80%
from 20% to 25%



Composition 17
from 80% to 85%
from 15% to 20%



Composition 18
from 85% to 90%
from 10% to 15%



Composition 19
from 90% to 95%
from 5% to 10%



Composition 20
from 95% to 99%
from 1% to 5%










In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:














HFO-1336yf
HFC-263fb




















Composition 1
from 1% to 5%
from 95% to 99%



Composition 2
from 5% to 10%
from 90% to 95%



Composition 3
from 10% to 15%
from 85% to 90%



Composition 4
from 15% to 20%
from 80% to 85%



Composition 5
from 20% to 25%
from 75% to 80%



Composition 6
from 25% to 30%
from 70% to 75%



Composition 7
from 30% to 35%
from 65% to 70%



Composition 8
from 35% to 40%
from 60% to 65%



Composition 9
from 40% to 45%
from 55% to 60%



Composition 10
from 45% to 50%
from 50% to 55%



Composition 11
from 50% to 55%
from 45% to 50%



Composition 12
from 55% to 60%
from 40% to 45%



Composition 13
from 60% to 65%
from 35% to 40%



Composition 14
from 65% to 70%
from 30% to 35%



Composition 15
from 70% to 75%
from 25% to 30%



Composition 16
from 75% to 80%
from 20% to 25%



Composition 17
from 80% to 85%
from 15% to 20%



Composition 18
from 85% to 90%
from 10% to 15%



Composition 19
from 90% to 95%
from 5% to 10%



Composition 20
from 95% to 99%
from 1% to 5%










In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:














HFO-1336yf
HFC-134




















Composition 1
from 1% to 5%
from 95% to 99%



Composition 2
from 5% to 10%
from 90% to 95%



Composition 3
from 10% to 15%
from 85% to 90%



Composition 4
from 15% to 20%
from 80% to 85%



Composition 5
from 20% to 25%
from 75% to 80%



Composition 6
from 25% to 30%
from 70% to 75%



Composition 7
from 30% to 35%
from 65% to 70%



Composition 8
from 35% to 40%
from 60% to 65%



Composition 9
from 40% to 45%
from 55% to 60%



Composition 10
from 45% to 50%
from 50% to 55%



Composition 11
from 50% to 55%
from 45% to 50%



Composition 12
from 55% to 60%
from 40% to 45%



Composition 13
from 60% to 65%
from 35% to 40%



Composition 14
from 65% to 70%
from 30% to 35%



Composition 15
from 70% to 75%
from 25% to 30%



Composition 16
from 75% to 80%
from 20% to 25%



Composition 17
from 80% to 85%
from 15% to 20%



Composition 18
from 85% to 90%
from 10% to 15%



Composition 19
from 90% to 95%
from 5% to 10%



Composition 20
from 95% to 99%
from 1% to 5%










In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:














HFO-1336yf
HFC-134a




















Composition 1
from 1% to 5%
from 95% to 99%



Composition 2
from 5% to 10%
from 90% to 95%



Composition 3
from 10% to 15%
from 85% to 90%



Composition 4
from 15% to 20%
from 80% to 85%



Composition 5
from 20% to 25%
from 75% to 80%



Composition 6
from 25% to 30%
from 70% to 75%



Composition 7
from 30% to 35%
from 65% to 70%



Composition 8
from 35% to 40%
from 60% to 65%



Composition 9
from 40% to 45%
from 55% to 60%



Composition 10
from 45% to 50%
from 50% to 55%



Composition 11
from 50% to 55%
from 45% to 50%



Composition 12
from 55% to 60%
from 40% to 45%



Composition 13
from 60% to 65%
from 35% to 40%



Composition 14
from 65% to 70%
from 30% to 35%



Composition 15
from 70% to 75%
from 25% to 30%



Composition 16
from 75% to 80%
from 20% to 25%



Composition 17
from 80% to 85%
from 15% to 20%



Composition 18
from 85% to 90%
from 10% to 15%



Composition 19
from 90% to 95%
from 5% to 10%



Composition 20
from 95% to 99%
from 1% to 5%










In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:














HFO-1336yf
HFC-152a




















Composition 1
from 1% to 5%
from 95% to 99%



Composition 2
from 5% to 10%
from 90% to 95%



Composition 3
from 10% to 15%
from 85% to 90%



Composition 4
from 15% to 20%
from 80% to 85%



Composition 5
from 20% to 25%
from 75% to 80%



Composition 6
from 25% to 30%
from 70% to 75%



Composition 7
from 30% to 35%
from 65% to 70%



Composition 8
from 35% to 40%
from 60% to 65%



Composition 9
from 40% to 45%
from 55% to 60%



Composition 10
from 45% to 50%
from 50% to 55%



Composition 11
from 50% to 55%
from 45% to 50%



Composition 12
from 55% to 60%
from 40% to 45%



Composition 13
from 60% to 65%
from 35% to 40%



Composition 14
from 65% to 70%
from 30% to 35%



Composition 15
from 70% to 75%
from 25% to 30%



Composition 16
from 75% to 80%
from 20% to 25%



Composition 17
from 80% to 85%
from 15% to 20%



Composition 18
from 85% to 90%
from 10% to 15%



Composition 19
from 90% to 95%
from 5% to 10%



Composition 20
from 95% to 99%
from 1% to 5%










In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:















HFO-1336yf
HFC-134a
HFO-1234ze



















Composition 1
from 1% to 10%
from 1% to 10%
from 80% to 98%


Composition 2
from 1% to 10%
from 10% to 20%
from 70% to 89%


Composition 3
from 1% to 10%
from 20% to 30%
from 60% to 79%


Composition 4
from 1% to 10%
from 30% to 40%
from 50% to 69%


Composition 5
from 1% to 10%
from 40% to 50%
from 40% to 59%


Composition 6
from 1% to 10%
from 50% to 60%
from 30% to 49%


Composition 7
from 1% to 10%
from 60% to 70%
from 20% to 39%


Composition 8
from 1% to 10%
from 70% to 80%
from 10% to 29%


Composition 9
from 1% to 10%
from 80% to 90%
from 1% to 19%


Composition 10
from 1% to 10%
from 90% to 98%
from 1% to 9%


Composition 11
from 10% to 20%
from 1% to 10%
from 70% to 89%


Composition 12
from 10% to 20%
from 10% to 20%
from 60% to 80%


Composition 13
from 10% to 20%
from 20% to 30%
from 50% to 70%


Composition 14
from 10% to 20%
from 30% to 40%
from 40% to 60%


Composition 15
from 10% to 20%
from 40% to 50%
from 30% to 50%


Composition 16
from 10% to 20%
from 50% to 60%
from 20% to 40%


Composition 17
from 10% to 20%
from 60% to 70%
from 10% to 30%


Composition 18
from 10% to 20%
from 70% to 80%
from 1% to 20%


Composition 19
from 10% to 20%
from 80% to 90%
from 1% to 10%


Composition 20
from 20% to 30%
from 1% to 10%
from 60% to 79%


Composition 21
from 20% to 30%
from 10% to 20%
from 50% to 70%


Composition 22
from 20% to 30%
from 20% to 30%
from 40% to 60%


Composition 23
from 20% to 30%
from 30% to 40%
from 30% to 50%


Composition 24
from 20% to 30%
from 40% to 50%
from 20% to 40%


Composition 25
from 20% to 30%
from 50% to 60%
from 10% to 30%


Composition 26
from 20% to 30%
from 60% to 70%
from 1% to 20%


Composition 27
from 20% to 30%
from 70% to 80%
from 1% to 10%


Composition 28
from 30% to 40%
from 1% to 10%
from 50% to 69%


Composition 29
from 30% to 40%
from 10% to 20%
from 40% to 60%


Composition 30
from 30% to 40%
from 20% to 30%
from 30% to 50%


Composition 31
from 30% to 40%
from 30% to 40%
from 20% to 40%


Composition 32
from 30% to 40%
from 40% to 50%
from 10% to 30%


Composition 33
from 30% to 40%
from 50% to 60%
from 1% to 20%


Composition 34
from 30% to 40%
from 60% to 70%
from 1% to 10%


Composition 35
from 40% to 50%
from 1% to 10%
from 40% to 59%


Composition 36
from 40% to 50%
from 10% to 20%
from 30% to 50%


Composition 37
from 40% to 50%
from 20% to 30%
from 20% to 40%


Composition 38
from 40% to 50%
from 30% to 40%
from 10% to 30%


Composition 39
from 40% to 50%
from 40% to 50%
from 1% to 20%


Composition 40
from 40% to 50%
from 50% to 60%
from 1% to 10%


Composition 41
from 50% to 60%
from 1% to 10%
from 30% to 49%


Composition 42
from 50% to 60%
from 10% to 20%
from 20% to 40%


Composition 43
from 50% to 60%
from 20% to 30%
from 10% to 30%


Composition 44
from 50% to 60%
from 30% to 40%
from 1% to 20%


Composition 45
from 50% to 60%
from 40% to 50%
from 1% to 10%


Composition 46
from 60% to 70%
from 1% to 10%
from 20% to 39%


Composition 47
from 60% to 70%
from 10% to 20%
from 10% to 30%


Composition 48
from 60% to 70%
from 20% to 30%
from 1% to 20%


Composition 49
from 60% to 70%
from 30% to 40%
from 1% to 10%


Composition 50
from 70% to 80%
from 1% to 10%
from 10% to 29%


Composition 51
from 70% to 80%
from 10% to 20%
from 1% to 20%


Composition 52
from 70% to 80%
from 20% to 30%
from 1% to 10%


Composition 53
from 80% to 90%
from 1% to 10%
from 1% to 19%


Composition 54
from 80% to 90%
from 10% to 20%
from 1% to 10%


Composition 55
from 90% to 98%
from 1% to 9%
from 1% to 9%









In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:















HFO-1336yf
HFC-134a
HFC-263fb



















Composition 1
from 1% to 10%
from 1% to 10%
from 80% to 98%


Composition 2
from 1% to 10%
from 10% to 20%
from 70% to 89%


Composition 3
from 1% to 10%
from 20% to 30%
from 60% to 79%


Composition 4
from 1% to 10%
from 30% to 40%
from 50% to 69%


Composition 5
from 1% to 10%
from 40% to 50%
from 40% to 59%


Composition 6
from 1% to 10%
from 50% to 60%
from 30% to 49%


Composition 7
from 1% to 10%
from 60% to 70%
from 20% to 39%


Composition 8
from 1% to 10%
from 70% to 80%
from 10% to 29%


Composition 9
from 1% to 10%
from 80% to 90%
from 1% to 19%


Composition 10
from 1% to 10%
from 90% to 98%
from 1% to 9%


Composition 11
from 10% to 20%
from 1% to 10%
from 70% to 89%


Composition 12
from 10% to 20%
from 10% to 20%
from 60% to 80%


Composition 13
from 10% to 20%
from 20% to 30%
from 50% to 70%


Composition 14
from 10% to 20%
from 30% to 40%
from 40% to 60%


Composition 15
from 10% to 20%
from 40% to 50%
from 30% to 50%


Composition 16
from 10% to 20%
from 50% to 60%
from 20% to 40%


Composition 17
from 10% to 20%
from 60% to 70%
from 10% to 30%


Composition 18
from 10% to 20%
from 70% to 80%
from 1% to 20%


Composition 19
from 10% to 20%
from 80% to 90%
from 1% to 10%


Composition 20
from 20% to 30%
from 1% to 10%
from 60% to 79%


Composition 21
from 20% to 30%
from 10% to 20%
from 50% to 70%


Composition 22
from 20% to 30%
from 20% to 30%
from 40% to 60%


Composition 23
from 20% to 30%
from 30% to 40%
from 30% to 50%


Composition 24
from 20% to 30%
from 40% to 50%
from 20% to 40%


Composition 25
from 20% to 30%
from 50% to 60%
from 10% to 30%


Composition 26
from 20% to 30%
from 60% to 70%
from 1% to 20%


Composition 27
from 20% to 30%
from 70% to 80%
from 1% to 10%


Composition 28
from 30% to 40%
from 1% to 10%
from 50% to 69%


Composition 29
from 30% to 40%
from 10% to 20%
from 40% to 60%


Composition 30
from 30% to 40%
from 20% to 30%
from 30% to 50%


Composition 31
from 30% to 40%
from 30% to 40%
from 20% to 40%


Composition 32
from 30% to 40%
from 40% to 50%
from 10% to 30%


Composition 33
from 30% to 40%
from 50% to 60%
from 1% to 20%


Composition 34
from 30% to 40%
from 60% to 70%
from 1% to 10%


Composition 35
from 40% to 50%
from 1% to 10%
from 40% to 59%


Composition 36
from 40% to 50%
from 10% to 20%
from 30% to 50%


Composition 37
from 40% to 50%
from 20% to 30%
from 20% to 40%


Composition 38
from 40% to 50%
from 30% to 40%
from 10% to 30%


Composition 39
from 40% to 50%
from 40% to 50%
from 1% to 20%


Composition 40
from 40% to 50%
from 50% to 60%
from 1% to 10%


Composition 41
from 50% to 60%
from 1% to 10%
from 30% to 49%


Composition 42
from 50% to 60%
from 10% to 20%
from 20% to 40%


Composition 43
from 50% to 60%
from 20% to 30%
from 10% to 30%


Composition 44
from 50% to 60%
from 30% to 40%
from 1% to 20%


Composition 45
from 50% to 60%
from 40% to 50%
from 1% to 10%


Composition 46
from 60% to 70%
from 1% to 10%
from 20% to 39%


Composition 47
from 60% to 70%
from 10% to 20%
from 10% to 30%


Composition 48
from 60% to 70%
from 20% to 30%
from 1% to 20%


Composition 49
from 60% to 70%
from 30% to 40%
from 1% to 10%


Composition 50
from 70% to 80%
from 1% to 10%
from 10% to 29%


Composition 51
from 70% to 80%
from 10% to 20%
from 1% to 20%


Composition 52
from 70% to 80%
from 20% to 30%
from 1% to 10%


Composition 53
from 80% to 90%
from 1% to 10%
from 1% to 19%


Composition 54
from 80% to 90%
from 10% to 20%
from 1% to 10%


Composition 55
from 90% to 98%
from 1% to 9%
from 1% to 9%









In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:















HFO-1336yf
HFC-134a
HFC-152a



















Composition 1
from 1% to 10%
from 1% to 10%
from 80% to 98%


Composition 2
from 1% to 10%
from 10% to 20%
from 70% to 89%


Composition 3
from 1% to 10%
from 20% to 30%
from 60% to 79%


Composition 4
from 1% to 10%
from 30% to 40%
from 50% to 69%


Composition 5
from 1% to 10%
from 40% to 50%
from 40% to 59%


Composition 6
from 1% to 10%
from 50% to 60%
from 30% to 49%


Composition 7
from 1% to 10%
from 60% to 70%
from 20% to 39%


Composition 8
from 1% to 10%
from 70% to 80%
from 10% to 29%


Composition 9
from 1% to 10%
from 80% to 90%
from 1% to 19%


Composition 10
from 1% to 10%
from 90% to 98%
from 1% to 9%


Composition 11
from 10% to 20%
from 1% to 10%
from 70% to 89%


Composition 12
from 10% to 20%
from 10% to 20%
from 60% to 80%


Composition 13
from 10% to 20%
from 20% to 30%
from 50% to 70%


Composition 14
from 10% to 20%
from 30% to 40%
from 40% to 60%


Composition 15
from 10% to 20%
from 40% to 50%
from 30% to 50%


Composition 16
from 10% to 20%
from 50% to 60%
from 20% to 40%


Composition 17
from 10% to 20%
from 60% to 70%
from 10% to 30%


Composition 18
from 10% to 20%
from 70% to 80%
from 1% to 20%


Composition 19
from 10% to 20%
from 80% to 90%
from 1% to 10%


Composition 20
from 20% to 30%
from 1% to 10%
from 60% to 79%


Composition 21
from 20% to 30%
from 10% to 20%
from 50% to 70%


Composition 22
from 20% to 30%
from 20% to 30%
from 40% to 60%


Composition 23
from 20% to 30%
from 30% to 40%
from 30% to 50%


Composition 24
from 20% to 30%
from 40% to 50%
from 20% to 40%


Composition 25
from 20% to 30%
from 50% to 60%
from 10% to 30%


Composition 26
from 20% to 30%
from 60% to 70%
from 1% to 20%


Composition 27
from 20% to 30%
from 70% to 80%
from 1% to 10%


Composition 28
from 30% to 40%
from 1% to 10%
from 50% to 69%


Composition 29
from 30% to 40%
from 10% to 20%
from 40% to 60%


Composition 30
from 30% to 40%
from 20% to 30%
from 30% to 50%


Composition 31
from 30% to 40%
from 30% to 40%
from 20% to 40%


Composition 32
from 30% to 40%
from 40% to 50%
from 10% to 30%


Composition 33
from 30% to 40%
from 50% to 60%
from 1% to 20%


Composition 34
from 30% to 40%
from 60% to 70%
from 1% to 10%


Composition 35
from 40% to 50%
from 1% to 10%
from 40% to 59%


Composition 36
from 40% to 50%
from 10% to 20%
from 30% to 50%


Composition 37
from 40% to 50%
from 20% to 30%
from 20% to 40%


Composition 38
from 40% to 50%
from 30% to 40%
from 10% to 30%


Composition 39
from 40% to 50%
from 40% to 50%
from 1% to 20%


Composition 40
from 40% to 50%
from 50% to 60%
from 1% to 10%


Composition 41
from 50% to 60%
from 1% to 10%
from 30% to 49%


Composition 42
from 50% to 60%
from 10% to 20%
from 20% to 40%


Composition 43
from 50% to 60%
from 20% to 30%
from 10% to 30%


Composition 44
from 50% to 60%
from 30% to 40%
from 1% to 20%


Composition 45
from 50% to 60%
from 40% to 50%
from 1% to 10%


Composition 46
from 60% to 70%
from 1% to 10%
from 20% to 39%


Composition 47
from 60% to 70%
from 10% to 20%
from 10% to 30%


Composition 48
from 60% to 70%
from 20% to 30%
from 1% to 20%


Composition 49
from 60% to 70%
from 30% to 40%
from 1% to 10%


Composition 50
from 70% to 80%
from 1% to 10%
from 10% to 29%


Composition 51
from 70% to 80%
from 10% to 20%
from 1% to 20%


Composition 52
from 70% to 80%
from 20% to 30%
from 1% to 10%


Composition 53
from 80% to 90%
from 1% to 10%
from 1% to 19%


Composition 54
from 80% to 90%
from 10% to 20%
from 1% to 10%


Composition 55
from 90% to 98%
from 1% to 9%
from 1% to 9%









In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:















HFO-1336yf
HFC-134
HFO-1234ze



















Composition 1
from 1% to 10%
from 1% to 10%
from 80% to 98%


Composition 2
from 1% to 10%
from 10% to 20%
from 70% to 89%


Composition 3
from 1% to 10%
from 20% to 30%
from 60% to 79%


Composition 4
from 1% to 10%
from 30% to 40%
from 50% to 69%


Composition 5
from 1% to 10%
from 40% to 50%
from 40% to 59%


Composition 6
from 1% to 10%
from 50% to 60%
from 30% to 49%


Composition 7
from 1% to 10%
from 60% to 70%
from 20% to 39%


Composition 8
from 1% to 10%
from 70% to 80%
from 10% to 29%


Composition 9
from 1% to 10%
from 80% to 90%
from 1% to 19%


Composition 10
from 1% to 10%
from 90% to 98%
from 1% to 9%


Composition 11
from 10% to 20%
from 1% to 10%
from 70% to 89%


Composition 12
from 10% to 20%
from 10% to 20%
from 60% to 80%


Composition 13
from 10% to 20%
from 20% to 30%
from 50% to 70%


Composition 14
from 10% to 20%
from 30% to 40%
from 40% to 60%


Composition 15
from 10% to 20%
from 40% to 50%
from 30% to 50%


Composition 16
from 10% to 20%
from 50% to 60%
from 20% to 40%


Composition 17
from 10% to 20%
from 60% to 70%
from 10% to 30%


Composition 18
from 10% to 20%
from 70% to 80%
from 1% to 20%


Composition 19
from 10% to 20%
from 80% to 90%
from 1% to 10%


Composition 20
from 20% to 30%
from 1% to 10%
from 60% to 79%


Composition 21
from 20% to 30%
from 10% to 20%
from 50% to 70%


Composition 22
from 20% to 30%
from 20% to 30%
from 40% to 60%


Composition 23
from 20% to 30%
from 30% to 40%
from 30% to 50%


Composition 24
from 20% to 30%
from 40% to 50%
from 20% to 40%


Composition 25
from 20% to 30%
from 50% to 60%
from 10% to 30%


Composition 26
from 20% to 30%
from 60% to 70%
from 1% to 20%


Composition 27
from 20% to 30%
from 70% to 80%
from 1% to 10%


Composition 28
from 30% to 40%
from 1% to 10%
from 50% to 69%


Composition 29
from 30% to 40%
from 10% to 20%
from 40% to 60%


Composition 30
from 30% to 40%
from 20% to 30%
from 30% to 50%


Composition 31
from 30% to 40%
from 30% to 40%
from 20% to 40%


Composition 32
from 30% to 40%
from 40% to 50%
from 10% to 30%


Composition 33
from 30% to 40%
from 50% to 60%
from 1% to 20%


Composition 34
from 30% to 40%
from 60% to 70%
from 1% to 10%


Composition 35
from 40% to 50%
from 1% to 10%
from 40% to 59%


Composition 36
from 40% to 50%
from 10% to 20%
from 30% to 50%


Composition 37
from 40% to 50%
from 20% to 30%
from 20% to 40%


Composition 38
from 40% to 50%
from 30% to 40%
from 10% to 30%


Composition 39
from 40% to 50%
from 40% to 50%
from 1% to 20%


Composition 40
from 40% to 50%
from 50% to 60%
from 1% to 10%


Composition 41
from 50% to 60%
from 1% to 10%
from 30% to 49%


Composition 42
from 50% to 60%
from 10% to 20%
from 20% to 40%


Composition 43
from 50% to 60%
from 20% to 30%
from 10% to 30%


Composition 44
from 50% to 60%
from 30% to 40%
from 1% to 20%


Composition 45
from 50% to 60%
from 40% to 50%
from 1% to 10%


Composition 46
from 60% to 70%
from 1% to 10%
from 20% to 39%


Composition 47
from 60% to 70%
from 10% to 20%
from 10% to 30%


Composition 48
from 60% to 70%
from 20% to 30%
from 1% to 20%


Composition 49
from 60% to 70%
from 30% to 40%
from 1% to 10%


Composition 50
from 70% to 80%
from 1% to 10%
from 10% to 29%


Composition 51
from 70% to 80%
from 10% to 20%
from 1% to 20%


Composition 52
from 70% to 80%
from 20% to 30%
from 1% to 10%


Composition 53
from 80% to 90%
from 1% to 10%
from 1% to 19%


Composition 54
from 80% to 90%
from 10% to 20%
from 1% to 10%


Composition 55
from 90% to 98%
from 1% to 9%
from 1% to 9%









In certain embodiments, the composition according to the invention has one of the formulations listed in the table below:















HFO-1336yf
HFC-134
HFC-263fb



















Composition 1
from 1% to 10%
from 1% to 10%
from 80% to 98%


Composition 2
from 1% to 10%
from 10% to 20%
from 70% to 89%


Composition 3
from 1% to 10%
from 20% to 30%
from 60% to 79%


Composition 4
from 1% to 10%
from 30% to 40%
from 50% to 69%


Composition 5
from 1% to 10%
from 40% to 50%
from 40% to 59%


Composition 6
from 1% to 10%
from 50% to 60%
from 30% to 49%


Composition 7
from 1% to 10%
from 60% to 70%
from 20% to 39%


Composition 8
from 1% to 10%
from 70% to 80%
from 10% to 29%


Composition 9
from 1% to 10%
from 80% to 90%
from 1% to 19%


Composition 10
from 1% to 10%
from 90% to 98%
from 1% to 9%


Composition 11
from 10% to 20%
from 1% to 10%
from 70% to 89%


Composition 12
from 10% to 20%
from 10% to 20%
from 60% to 80%


Composition 13
from 10% to 20%
from 20% to 30%
from 50% to 70%


Composition 14
from 10% to 20%
from 30% to 40%
from 40% to 60%


Composition 15
from 10% to 20%
from 40% to 50%
from 30% to 50%


Composition 16
from 10% to 20%
from 50% to 60%
from 20% to 40%


Composition 17
from 10% to 20%
from 60% to 70%
from 10% to 30%


Composition 18
from 10% to 20%
from 70% to 80%
from 1% to 20%


Composition 19
from 10% to 20%
from 80% to 90%
from 1% to 10%


Composition 20
from 20% to 30%
from 1% to 10%
from 60% to 79%


Composition 21
from 20% to 30%
from 10% to 20%
from 50% to 70%


Composition 22
from 20% to 30%
from 20% to 30%
from 40% to 60%


Composition 23
from 20% to 30%
from 30% to 40%
from 30% to 50%


Composition 24
from 20% to 30%
from 40% to 50%
from 20% to 40%


Composition 25
from 20% to 30%
from 50% to 60%
from 10% to 30%


Composition 26
from 20% to 30%
from 60% to 70%
from 1% to 20%


Composition 27
from 20% to 30%
from 70% to 80%
from 1% to 10%


Composition 28
from 30% to 40%
from 1% to 10%
from 50% to 69%


Composition 29
from 30% to 40%
from 10% to 20%
from 40% to 60%


Composition 30
from 30% to 40%
from 20% to 30%
from 30% to 50%


Composition 31
from 30% to 40%
from 30% to 40%
from 20% to 40%


Composition 32
from 30% to 40%
from 40% to 50%
from 10% to 30%


Composition 33
from 30% to 40%
from 50% to 60%
from 1% to 20%


Composition 34
from 30% to 40%
from 60% to 70%
from 1% to 10%


Composition 35
from 40% to 50%
from 1% to 10%
from 40% to 59%


Composition 36
from 40% to 50%
from 10% to 20%
from 30% to 50%


Composition 37
from 40% to 50%
from 20% to 30%
from 20% to 40%


Composition 38
from 40% to 50%
from 30% to 40%
from 10% to 30%


Composition 39
from 40% to 50%
from 40% to 50%
from 1% to 20%


Composition 40
from 40% to 50%
from 50% to 60%
from 1% to 10%


Composition 41
from 50% to 60%
from 1% to 10%
from 30% to 49%


Composition 42
from 50% to 60%
from 10% to 20%
from 20% to 40%


Composition 43
from 50% to 60%
from 20% to 30%
from 10% to 30%


Composition 44
from 50% to 60%
from 30% to 40%
from 1% to 20%


Composition 45
from 50% to 60%
from 40% to 50%
from 1% to 10%


Composition 46
from 60% to 70%
from 1% to 10%
from 20% to 39%


Composition 47
from 60% to 70%
from 10% to 20%
from 10% to 30%


Composition 48
from 60% to 70%
from 20% to 30%
from 1% to 20%


Composition 49
from 60% to 70%
from 30% to 40%
from 1% to 10%


Composition 50
from 70% to 80%
from 1% to 10%
from 10% to 29%


Composition 51
from 70% to 80%
from 10% to 20%
from 1% to 20%


Composition 52
from 70% to 80%
from 20% to 30%
from 1% to 10%


Composition 53
from 80% to 90%
from 1% to 10%
from 1% to 19%


Composition 54
from 80% to 90%
from 10% to 20%
from 1% to 10%


Composition 55
from 90% to 98%
from 1% to 9%
from 1% to 9%









Among the above compositions, some of them have the advantage of being quasi-azeotropic.
The term “quasi-azeotropic” denotes compositions for which, at constant temperature, the liquid saturation pressure and the vapor saturation pressure are virtually identical (the maximum pressure difference being 10%, or even advantageously 5%, relative to the liquid saturation pressure). These heat-transfer fluids have an advantage of ease of use. In the absence of a significant temperature glide, there is no significant change in the circulating composition, nor any significant change in the composition in the case of leakage.
Some of the compositions of the invention are quasi-azeotropic at a reference temperature of −5° C.
Some of the compositions of the invention are inflammable, within the meaning of standard ASHRAE 34-2007, and preferably with a test temperature of 60° C. instead of 100° C.
Some of the compositions of the invention have performance qualities that are equivalent and/or improved relative to a reference heat-transfer fluid, for example HFO-1234ze or HC-600a.
These performance qualities may especially be the volumetric capacity and/or the coefficient of performance.
The equivalent or improved performance qualities may especially be checked for the moderate-temperature cooling processes, i.e. those in which the temperature of the cooled fluid or body is from −15° C. to 15° C., preferably from −10° C. to 10° C. and more particularly preferably from −5° C. to 5° C. (ideally about 0° C.).
The equivalent or improved performance qualities may alternatively be checked for moderate-temperature heating processes, i.e. those in which the temperature of the heated fluid or body is from 30° C. to 80° C., preferably from 35° C. to 55° C. and more particularly preferably from 40° C. to 50° C. (ideally about 45° C.).
In the “moderate-temperature cooling or heating” processes mentioned above, the inlet temperature of the heat-transfer fluid to the evaporator is preferably from −20° C. to 10° C., especially from −15° C. to 5° C. and more particularly preferably from −10° C. to 0° C., for example about −5° C.; and the condensation-start temperature of the heat-transfer fluid in the condenser is preferably from 25° C. to 90° C., especially from 30° C. to 70° C. and more particularly preferably from 35° C. to 55° C., for example about 50° C. These processes may be refrigeration, air-conditioning or heating processes.
The equivalent or improved performance qualities may alternatively be checked for low-temperature refrigeration processes, i.e. those in which the temperature of the cooled fluid or body is from −40° C. to −10° C., preferably from −35° C. to −25° C. and more particularly preferably from −30° C. to −20° C. (ideally about −25° C.).
In the “low-temperature refrigeration” processes mentioned above, the inlet temperature of the heat-transfer fluid to the evaporator is preferably from −45° C. to −15° C., especially from −40° C. to −20° C. and more particularly preferably from −35° C. to −25° C., for example about −30° C.; and the condensation-start temperature of the heat-transfer fluid in the condenser is preferably from 25° C. to 80° C., especially from 30° C. to 60° C. and more particularly preferably from 35° C. to 55° C., for example about 40° C.
Some compositions of the invention are also particularly advantageous for high-temperature heating processes, i.e. those in which the temperature of the heated fluid or body is greater than 90° C., for example greater than or equal to 110° C. or greater than or equal to 130° C., and preferably less than or equal to 170° C.
Some compositions of the invention are also particularly advantageous for refrigerated transportation applications and especially refrigerated containers.
The compositions according to the invention may serve to replace various heat-transfer fluids in various heat-transfer applications. For example, the compositions according to the invention may serve to replace:

    
    
        1,1,1,2-tetrafluoroethane (R134a);
        1,1-difluoroethane (R152a);
        1,1,1,3,3-pentafluoropropane (R245fa);
        mixtures of pentafluoroethane (R125), 1,1,1,2-tetrafluoroethane (R134a) and isobutane (R600a), namely R422;
        chlorodifluoromethane (R22);
        the mixture of 51.2% chloropentafluoroethane (R115) and 48.8% chlorodifluoromethane (R22), namely R502;
        any hydrocarbon;
        the mixture of 20% difluoromethane (R32), 40% pentafluoroethane (R125) and 40% 1,1,1,2-tetrafluoroethane (R134a), namely R407A;
        the mixture of 23% difluoromethane (R32), 25% pentafluoroethane (R125) and 52% 1,1,1,2-tetrafluoroethane (R134a), namely R407C;
        the mixture of 30% difluoromethane (R32), 30% pentafluoroethane (R125) and 40% 1,1,1,2-tetrafluoroethane (R134a), namely R407F;
        the mixture of 44% pentafluoroethane (R125), 52% 1,1,1-trifluoroethane (R143a) and 4% 1,1,1,2-tetrafluoroethane (R134a), namely R404A;
        R1234yf (2,3,3,3-tetrafluoropropene);
        R1234ze (1,3,3,3-tetrafluoropropene).
    
    


The compositions according to the invention may also be useful as expansion agents, propellants (for example for an aerosol), cleaning agents or solvents, besides their use as heat-transfer fluids.
As propellants, the compositions according to the invention may be used alone or in combination with known propellants. The propellant comprises, and preferably consists of, a composition according to the invention. The active substance that is to be sprayed may be mixed with the propellant and inert compounds, solvents or other additives, to form a composition to be sprayed. Preferably, the composition to be sprayed is an aerosol.
As expansion agent, the compositions according to the invention may be included in an expansion composition, which preferably comprises one or more other compounds that are capable of reacting and of forming a foam or cellular structure under suitable conditions, as is known to those skilled in the art.
In particular, the invention proposes a process for preparing an expanded thermoplastic product, first comprising the preparation of a polymeric expansion composition. Typically, the polymeric expansion composition is prepared by plasticizing a polymeric resin and by mixing the compounds of an expansion agent composition at an initial pressure. The plasticization of the polymer resin may be performed under the effect of heat, by heating the polymer resin to soften it sufficiently to mix an expansion agent composition. Generally, the plasticization temperature is close to the glass transition temperature or the melting point for crystalline polymers.
Other uses of the compositions according to the invention comprise uses as solvents, cleaning agents or the like. Examples that may be mentioned include steam degreasing, precision cleaning, the cleaning of electronic circuits, dry cleaning, abrasive cleaning, solvents for depositing lubricants and release agents, and other solvent or surface treatments.
Example 1—Method for Calculating the Properties of the Heat-Transfer Fluids in the Various Configurations Envisaged
The RK-Soave equation is used for calculating the densities, enthalpies, entropies and liquid/vapor equilibrium data for the mixtures. The use of this equation requires knowledge of the properties of the pure substances used in the mixtures under consideration and also the coefficients of interaction for each binary mixture.
The data available for each pure substance are the boiling point, the critical temperature and the critical pressure, the pressure curve as a function of the temperature from the boiling point up to the critical point, the saturated liquid density and saturated vapor density as a function of the temperature.
The data regarding HFCs are published in the ASHRAE Handbook 2005, chapter 20, and are also available under Refrop (software developed by NIST for calculating the properties of cold-generating fluids).
The data of the temperature-pressure curve for HFOs are measured via the static method. The critical temperature and the critical pressure are measured with a C80 calorimeter sold by Setaram.
The RK-Soave equation uses coefficients of binary interaction to represent the behavior of the products as mixtures. The coefficients are calculated as a function of the experimental liquid/vapor equilibrium data.
The technique used for the liquid/vapor equilibrium measurements is the static analytical cell method. The equilibrium cell comprises a sapphire tube and is equipped with two electromagnetic ROLSITM samplers. It is immersed in a cryothermostatic bath (Huber HS40). A field-driven magnetic stirrer rotating at variable speed is used to accelerate the establishment of the equilibria. The samples are analyzed by gas chromatography (HP5890 series II) using a catharometer (TCD).
The liquid/vapor equilibrium measurements on the HFC-134/HFO-1234ze binary mixture are performed on the following isotherm: 20° C.
The liquid/vapor equilibrium measurements on the HFC-134/HFC-263fb binary mixture are performed on the following isotherm: 30° C.
The liquid/vapor equilibrium measurements on the HFC-134/HFO-1336yf binary mixture are performed for the following isotherm: 50° C.
The liquid/vapor equilibrium measurements on the HFC-134a/HFO-1234ze binary mixture are performed for the following isotherm: 20° C.
The liquid/vapor equilibrium measurements on the HFC-134a/HFC-263fb binary mixture are performed for the following isotherm: 30° C.
The liquid/vapor equilibrium measurements on the HFC-134a/HFO-1336yf binary mixture are performed for the following isotherm: 50° C.
The liquid/vapor equilibrium measurements on the HFC-134a/HFO-1234yf binary mixture are performed for the following isotherm: 20° C.
The liquid/vapor equilibrium measurements on the HFO-1234ze/HFC-263fb binary mixture are performed for the following isotherm: 30° C.
The liquid/vapor equilibrium measurements on the HFO-1234ze/HFO-1336yf binary mixture are performed for the following isotherm: 50° C.
The liquid/vapor equilibrium measurements on the HFO-1234ze/HFO-1234yf binary mixture are performed for the following isotherm: 18° C.
The liquid/vapor equilibrium measurements on the HFO-1234yf/HFO-1336yf binary mixture are performed for the following isotherm: 50° C.
The liquid/vapor equilibrium measurements on the HFO-1336yf/HFC-263fb binary mixture are performed for the following isotherm: 50° C.
To evaluate the energy performance qualities, a compression system equipped with an evaporator and counter-current condenser, a screw compressor and a depressurizer are considered.
The system functions with 5° C. of overheating. The evaporation temperature is −5° C. and the condensation temperature is 50° C.
The coefficient of performance (COP) is defined as being the working power provided by the system over the power supplied or consumed by the system.
The Lorenz coefficient of performance (COPLorenz) is a reference coefficient of performance. It is temperature dependent and is used to compare the COPs of the different fluids.
The Lorenz coefficient of performance is defined as follows (the temperatures T are in K):

Tcondensermean=Tcondenserinlet−Tcondenseroutlet 

Tevaporatormean=Tevaporatorinlet−Tevaporatorinlet 

The Lorenz COP in the case of conditioned air and refrigeration is:




  COPlorenz
  =
  
    
      T
      evaporator
      mean
    
    
      
        T
        condenser
        mean
      
      -
      
        T
        evaporator
        mean
      
    
  




The Lorenz COP in the case of heating is:




  COPlorenz
  =
  
    
      T
      condenser
      mean
    
    
      
        T
        condenser
        mean
      
      -
      
        T
        evaporator
        mean
      
    
  




For each composition, the coefficient of performance of the Lorenz cycle is calculated as a function of the corresponding temperatures.
In the tables that follow, “Temp (° C.)” denotes the temperature, “P sat liquid” denotes the saturating liquid pressure, “P sat vapor” denotes the saturating vapor pressure, “pressure diff. (%)” denotes the ratio of the difference between the saturating liquid pressure and the saturating vapor pressure, over the saturating liquid pressure (as a %), “Temp evap outlet” denotes the temperature of the fluid at the evaporator outlet, “Temp comp outlet” denotes the temperature of the fluid at the compressor outlet, “T cond outlet” denotes the temperature of the fluid at the condenser outlet, “Temp depress inlet” denotes the temperature of the fluid at the depressurizer inlet, “evap P (bar)” denotes the pressure of the fluid in the evaporator, “cond P (bar)” denotes the pressure of the fluid in the condenser, “Rate (p/p)” denotes the compression rate, “Glide” denotes the temperature glide, “% CAP” denotes the volumetric capacity of the fluid relative to the reference fluid indicated on the first line, “% COP/COPLorenz” denotes the ratio of the COP for the system relative to the COP for the corresponding Lorenz cycle.
Example 2—Data for the Quasi-Azeotropic Mixtures
HFO-1336yf/HFO-E-1234ze Mixture:





















P sat
P sat
%



HFO-
HFO-
Temp,
liq
vap
pressure



1234ze
1336yf
(° C.)
(bar)
(bar)
diff























65
35
−4
1.5
1.3
10.8



70
30
−4
1.5
1.4
9.4



75
25
−4
1.6
1.4
8.0



80
20
−4
1.6
1.5
6.4



85
15
−5
1.6
1.6
4.8



90
10
−5
1.7
1.6
3.2



95
5
−5
1.7
1.7
1.5










HFO-1336yf/HFC-134 Mixture:





















P sat
P sat
%



HFC-
HFO-
Temp,
liq
vap
pressure



134
1336yf
(° C.)
(bar)
(bar)
diff























60
40
−4
1.6
1.4
10.8



65
35
−4
1.6
1.5
8.7



70
30
−4
1.7
1.6
6.7



75
25
−5
1.7
1.6
5.0



80
20
−5
1.8
1.7
3.5



85
15
−5
1.8
1.8
2.3



90
10
−5
1.8
1.8
1.3



95
5
−5
1.9
1.8
0.6










HFO-1336yf/HFC-134a Mixture:





















P sat
P sat
%



HFC-
HFO-
Temp,
liq
vap
pressure



134a
1336yf
(° C.)
(bar)
(bar)
diff























80
20
−4
2.1
1.9
9.9



85
15
−4
2.2
2.1
7.4



90
10
−4
2.3
2.2
5.0



95
5
−5
2.4
2.3
2.5










HFO-1336yf/HFC-263fb Mixture:





















P sat
P sat
%



HFO-
HFC-
Temp,
liq
vap
pressure



1336yf
263fb
(° C.)
(bar)
(bar)
diff























95
5
−5
0.8
0.8
4.4



90
10
−5
0.9
0.8
7.1



85
15
−5
1.0
0.9
8.7



80
20
−4
1.0
0.9
9.7



75
25
−4
1.1
0.9
10.1



70
30
−4
1.1
1.0
10.1



65
35
−4
1.1
1.0
9.9



60
40
−4
1.2
1.1
9.4



55
45
−4
1.2
1.1
8.8



50
50
−4
1.2
1.1
8.0



45
55
−4
1.3
1.2
7.1



40
60
−4
1.3
1.2
6.2



35
65
−5
1.3
1.2
5.3



30
70
−5
1.3
1.3
4.3



25
75
−5
1.4
1.3
3.4



20
80
−5
1.4
1.3
2.6



15
85
−5
1.4
1.4
1.8



10
90
−5
1.4
1.4
1.1



5
95
−5
1.4
1.4
0.5










HFO-1336yf/HFO-1234yf Mixture:





















P sat
P sat
%



HFO-
HFO-
Temp,
liq
vap
pressure



1234yf
1336yf
(° C.)
(bar)
(bar)
diff























90
10
−4
2.4
2.2
8.7



95
5
−4
2.5
2.4
4.5










HFO-1336yf/HFO-E-1234ze/HFC-134 Mixture:




















P sat
P sat
%


HFO-
HFC-
HFO-
Temp,
liq
vap
pressure


1234ze
134
1336yf
(° C.)
(bar)
(bar)
diff





















5
60
35
−4
1.6
1.5
9.3


5
65
30
−4
1.7
1.6
7.2


5
70
25
−4
1.7
1.6
5.4


5
75
20
−5
1.8
1.7
3.7


5
80
15
−5
1.8
1.8
2.4


5
85
10
−5
1.8
1.8
1.3


5
90
5
−5
1.9
1.8
0.6


15
50
35
−4
1.6
1.5
10.5


15
55
30
−4
1.7
1.5
8.3


15
60
25
−4
1.7
1.6
6.2


15
65
20
−5
1.8
1.7
4.3


15
70
15
−5
1.8
1.7
2.7


15
75
10
−5
1.8
1.8
1.5


15
80
5
−5
1.9
1.8
0.6


25
45
30
−4
1.7
1.5
9.3


25
50
25
−4
1.7
1.6
7.1


25
55
20
−5
1.8
1.7
5.0


25
60
15
−5
1.8
1.7
3.2


25
65
10
−5
1.8
1.8
1.7


25
70
5
−5
1.9
1.8
0.7


35
35
30
−4
1.6
1.5
10.0


35
40
25
−4
1.7
1.6
7.9


35
45
20
−4
1.7
1.6
5.8


35
50
15
−5
1.8
1.7
3.8


35
55
10
−5
1.8
1.8
2.1


35
60
5
−5
1.8
1.8
0.9


45
25
30
−4
1.6
1.4
10.2


45
30
25
−4
1.7
1.5
8.4


45
35
20
−4
1.7
1.6
6.4


45
40
15
−5
1.8
1.7
4.5


45
45
10
−5
1.8
1.8
2.6


45
50
5
−5
1.8
1.8
1.1


55
15
30
−4
1.6
1.4
10.0


55
20
25
−4
1.6
1.5
8.5


55
25
20
−4
1.7
1.6
6.8


55
30
15
−5
1.7
1.6
4.9


55
35
10
−5
1.8
1.7
3.1


55
40
5
−5
1.8
1.8
1.4


65
5
30
−4
1.5
1.4
9.6


65
10
25
−4
1.6
1.5
8.2


65
15
20
−4
1.6
1.5
6.7


65
20
15
−5
1.7
1.6
5.1


65
25
10
−5
1.8
1.7
3.3


65
30
5
−5
1.8
1.8
1.7


75
5
20
−4
1.6
1.5
6.5


75
10
15
−5
1.7
1.6
5.0


75
15
10
−5
1.7
1.7
3.4


75
20
5
−5
1.8
1.8
1.7


85
5
10
−5
1.7
1.6
3.2


85
10
5
−5
1.8
1.7
1.7


90
5
5
−5
1.7
1.7
1.6









HFO-1336yf/HFO-E-1234ze/HFC-134a Mixture:




















P sat
P sat
%


HFC-
HFO-
HFO-
Temp,
liq
vap
pressure


134a
1234ze
1336yf
(° C.)
(bar)
(bar)
diff





















75
5
20
−4
2.1
1.9
9.9


80
5
15
−4
2.2
2.0
7.4


85
5
10
−4
2.3
2.2
5.0


90
5
5
−5
2.3
2.3
2.6


65
15
20
−4
2.1
1.9
10.2


75
15
10
−4
2.2
2.1
5.2


80
15
5
−5
2.3
2.2
2.9


55
25
20
−4
2.0
1.8
10.7


65
25
10
−4
2.2
2.1
5.7


70
25
5
−5
2.3
2.2
3.4


55
35
10
−4
2.1
2.0
6.3


60
35
5
−5
2.2
2.1
4.0


45
45
10
−4
2.1
1.9
6.8


50
45
5
−5
2.1
2.0
4.5


25
55
20
−4
1.8
1.6
10.7


35
55
10
−4
2.0
1.8
7.0


40
55
5
−5
2.1
2.0
4.8


5
65
30
−4
1.6
1.4
10.9


15
65
20
−4
1.7
1.6
9.6


25
65
10
−4
1.9
1.8
6.7


30
65
5
−5
2.0
1.9
4.8


5
75
20
−4
1.7
1.5
7.7


10
75
15
−4
1.7
1.6
7.0


15
75
10
−4
1.8
1.7
5.9


20
75
5
−5
1.9
1.8
4.4


5
85
10
−5
1.7
1.7
4.3


10
85
5
−5
1.8
1.8
3.4


5
90
5
−5
1.8
1.7
2.6









HFO-1336yf/HFO-E-1234ze/HFC-263fb Mixture:




















P sat
P sat
%


HFO-
HFO-
HFC-
Temp,
liq
vap
pressure


1234ze
1336yf
263fb
(° C.)
(bar)
(bar)
diff





















5
90
5
−5
0.9
0.8
8.2


5
60
35
−4
1.2
1.1
10.4


5
50
45
−4
1.2
1.1
8.9


5
40
55
−4
1.3
1.2
7.0


5
30
65
−5
1.4
1.3
5.0


5
20
75
−5
1.4
1.4
3.1


5
10
85
−5
1.5
1.4
1.4


15
40
45
−4
1.3
1.2
8.4


15
30
55
−4
1.4
1.3
6.1


15
20
65
−5
1.4
1.4
3.9


15
10
75
−5
1.5
1.5
2.1


15
5
80
−5
1.5
1.5
1.3


25
40
35
−4
1.4
1.2
9.6


25
30
45
−4
1.4
1.3
7.1


25
20
55
−5
1.5
1.4
4.6


25
10
65
−5
1.5
1.5
2.5


25
5
70
−5
1.5
1.5
1.6


35
30
35
−4
1.4
1.3
7.9


35
20
45
−5
1.5
1.4
5.2


35
10
55
−5
1.5
1.5
2.8


35
5
60
−5
1.6
1.5
1.8


45
30
25
−4
1.5
1.3
8.5


45
20
35
−5
1.5
1.4
5.6


45
10
45
−5
1.6
1.5
3.0


45
5
50
−5
1.6
1.6
1.9


55
30
15
−4
1.5
1.4
9.0


55
20
25
−4
1.6
1.5
5.9


55
10
35
−5
1.6
1.6
3.0


55
5
40
−5
1.6
1.6
1.8


65
30
5
−4
1.5
1.4
9.3


65
20
15
−4
1.6
1.5
6.2


65
10
25
−5
1.6
1.6
3.1


65
5
30
−5
1.7
1.6
1.7


75
20
5
−4
1.6
1.5
6.4


75
10
15
−5
1.7
1.6
3.1


75
5
20
−5
1.7
1.7
1.6


85
10
5
−5
1.7
1.6
3.1


85
5
10
−5
1.7
1.7
1.6


90
5
5
−5
1.7
1.7
1.5









HFO-1336yf/HFO-E-1234ze/HFO-1234yf Mixture:




















P sat
P sat
%


HFO-
HFO-
HFO-
Temp,
liq
vap
pressure


1234yf
1234ze
1336yf
(° C.)
(bar)
(bar)
diff





















85
5
10
−4
2.4
2.2
8.7


75
15
10
−4
2.3
2.1
9.0


80
15
5
−4
2.4
2.3
5.1


65
25
10
−4
2.3
2.1
9.3


70
25
5
−4
2.4
2.2
5.7


45
45
10
−4
2.1
1.9
9.6


50
45
5
−4
2.2
2.1
6.8


35
55
10
−4
2.0
1.8
9.3


40
55
5
−4
2.1
2.0
6.9


15
65
20
−4
1.8
1.6
11.0


25
65
10
−4
1.9
1.8
8.5


30
65
5
−4
2.0
1.9
6.6


5
75
20
−4
1.7
1.5
8.2


15
75
10
−4
1.8
1.7
7.0


20
75
5
−5
1.9
1.8
5.7


5
85
10
−5
1.7
1.7
4.7


10
85
5
−5
1.8
1.8
4.1


5
90
5
−5
1.8
1.7
3.0









HFO-1336yf/HFO-1234yf/HFC-134a Mixture:




















P sat
P sat
%


HFO-
HFC-
HFO-
Temp,
liq
vap
pressure


1234yf
134a
1336yf
(° C.)
(bar)
(bar)
diff





















85
5
10
−4
2.4
2.2
9.1


90
5
5
−4
2.5
2.4
4.9


75
15
10
−4
2.5
2.2
9.4


80
15
5
−4
2.6
2.4
5.1


65
25
10
−4
2.5
2.3
9.3


70
25
5
−4
2.6
2.5
5.0


55
35
10
−4
2.5
2.3
8.9


60
35
5
−4
2.6
2.5
4.8


45
45
10
−4
2.5
2.3
8.4


50
45
5
−4
2.6
2.5
4.6


35
55
10
−4
2.5
2.3
8.0


40
55
5
−5
2.6
2.5
4.4


25
65
10
−4
2.4
2.3
7.4


30
65
5
−5
2.5
2.4
4.3


5
75
20
−4
2.2
1.9
10.9


15
75
10
−4
2.4
2.2
6.7


20
75
5
−5
2.5
2.4
4.0


5
85
10
−4
2.3
2.2
5.7


10
85
5
−5
2.4
2.3
3.5


5
90
5
−5
2.4
2.3
3.1









HFO-1336yf/HFC-134/HFC-263fb Mixture:




















P sat
P sat
%


HFC-
HFO-
HFC-
Temp,
liq
vap
pressure


134
1336yf
263fb
(° C.)
(bar)
(bar)
diff





















5
50
45
−4
1.3
1.1
9.8


5
40
55
−4
1.3
1.2
7.7


5
30
65
−5
1.4
1.3
5.6


5
20
75
−5
1.4
1.4
3.7


5
10
85
−5
1.5
1.4
2.0


15
40
45
−4
1.4
1.2
10.4


15
30
55
−4
1.4
1.3
7.8


15
20
65
−5
1.5
1.4
5.5


15
10
75
−5
1.5
1.5
3.5


15
5
80
−5
1.5
1.5
2.7


25
30
45
−4
1.5
1.4
9.2


25
20
55
−4
1.6
1.5
6.5


25
10
65
−5
1.6
1.5
4.3


25
5
70
−5
1.6
1.6
3.4


35
30
35
−4
1.6
1.4
9.7


35
20
45
−4
1.6
1.5
6.8


35
10
55
−5
1.7
1.6
4.4


35
5
60
−5
1.7
1.6
3.4


45
30
25
−4
1.6
1.5
9.4


45
20
35
−4
1.7
1.6
6.5


45
10
45
−5
1.7
1.6
4.0


45
5
50
−5
1.7
1.7
3.0


55
30
15
−4
1.7
1.5
8.5


55
20
25
−4
1.7
1.6
5.6


55
10
35
−5
1.8
1.7
3.3


55
5
40
−5
1.8
1.7
2.3


65
30
5
−4
1.7
1.6
7.3


65
20
15
−5
1.7
1.7
4.6


65
10
25
−5
1.8
1.7
2.4


65
5
30
−5
1.8
1.8
1.5


75
20
5
−5
1.8
1.7
3.8


75
10
15
−5
1.8
1.8
1.7


75
5
20
−5
1.8
1.8
1.0


85
10
5
−5
1.8
1.8
1.4


85
5
10
−5
1.8
1.8
0.7


90
5
5
−5
1.9
1.8
0.6









HFO-1336yf/HFC-134a/HFC-263fb Mixture:




















P sat
P sat
%


HFC-
HFO-
HFC-
Temp,
liq
vap
pressure


134a
1336yf
263fb
(° C.)
(bar)
(bar)
diff





















5
40
55
−4
1.3
1.2
8.8


5
30
65
−4
1.4
1.3
6.6


5
20
75
−5
1.4
1.4
4.6


5
10
85
−5
1.5
1.4
2.9


15
20
65
−4
1.5
1.4
7.9


15
10
75
−5
1.6
1.5
5.7


15
5
80
−5
1.6
1.5
4.8


25
20
55
−4
1.6
1.5
10.3


25
10
65
−4
1.7
1.6
7.7


25
5
70
−4
1.7
1.6
6.6


35
10
55
−4
1.8
1.6
8.8


35
5
60
−4
1.8
1.7
7.5


45
10
45
−4
1.9
1.7
9.0


45
5
50
−4
1.9
1.8
7.7


55
10
35
−4
2.0
1.8
8.6


55
5
40
−4
2.0
1.9
7.2


65
10
25
−4
2.1
1.9
7.6


65
5
30
−4
2.1
2.0
6.2


75
20
5
−4
2.1
1.9
10.2


75
10
15
−4
2.2
2.0
6.3


75
5
20
−5
2.2
2.1
4.9


85
10
5
−4
2.3
2.1
5.3


85
5
10
−5
2.3
2.2
3.5


90
5
5
−5
2.3
2.3
2.9









Example 3—Results for a Moderate-Temperature Refrigeration, Comparison with HFO-1234ze























Temp
Temp

Temp










evap
comp
T cond
depress
evap P
cond P
Rate
glide
comp

% COP/



outlet (° C.)
outlet (° C.)
outlet (° C.)
inlet (° C.)
(bar)
(bar)
(p/p)
(° C.)
yield
% CAP
COPLorenz



























HFO-1234ze
−5
62
50
45
1.8
10.0
5.6
0.0
76
100
58























HFC-
HFC-
HFO-













134a
134
1336yf





0
75
25
−5
63
49
44
2
9.9
5.8
1.0
75.5
100
59


0
80
20
−5
64
50
45
2
10.1
5.8
0.7
75.6
103
60


0
85
15
−5
65
50
45
2
10.2
5.7
0.4
75.6
105
60


0
90
10
−5
66
50
45
2
10.4
5.7
0.3
75.7
108
61


0
95
5
−5
66
50
45
2
10.5
5.7
0.1
75.7
110
62


65
0
35
−3
65
48
43
2
10.4
5.6
4
75.9
104
58


70
0
30
−3
65
48
43
2
10.7
5.6
3
76.0
109
59


75
0
25
−4
66
48
43
2
11.1
5.5
3
76.1
114
60


80
0
20
−4
67
49
44
2
11.5
5.5
2
76.2
119
60


85
0
15
−4
68
49
44
2
11.9
5.5
2
76.3
123
61


90
0
10
−4
69
49
44
2
12.3
5.4
1
76.4
128
62


95
0
5
−5
70
50
45
2
12.7
5.4
1
76.4
133
63


5
70
25
−4
63.18
49
44
2
9.9
6
1.0
75.5
98
58


5
75
20
−5
63.83
50
45
2
10.1
6
0.7
75.6
102
59


5
80
15
−5
64.55
50
45
2
10.2
6
0.5
75.6
104
60


5
85
10
−5
65.34
50
45
2
10.4
6
0.3
75.7
108
61


5
90
5
−5
66.13
50
45
2
10.5
6
0.1
75.7
110
62


15
70
15
−5
64.09
50
45
2
10.2
6
0.5
75.6
102
59


15
75
10
−5
64.85
50
45
2
10.4
6
0.3
75.8
106
60


15
80
5
−5
65.64
50
45
2
10.5
6
0.1
75.7
109
61


25
60
15
−5
63.64
50
45
2
10.2
6
0.6
75.7
101
58


25
65
10
−5
64.42
50
45
2
10.4
6
0.3
75.7
105
59


25
70
5
−5
65.18
50
45
2
10.5
6
0.1
75.7
108
60


35
55
10
−5
64.04
50
45
2
10.3
6
0.4
75.7
103
58


35
60
5
−5
64.74
50
45
2
10.5
6
0.2
75.7
107
60


45
45
10
−5
63.68
50
45
2
10.2
6
0.5
75.7
101
58


45
50
5
−5
64.23
50
45
2
10.4
6
0.2
75.8
106
59


55
35
10
−5
63.24
50
45
2
10.1
6
0.6
75.7
100
57


55
40
5
−5
63.81
50
45
2
10.4
6
0.3
75.8
104
59


65
30
5
−5
63.37
50
45
2
10.2
6
0.3
75.8
103
58


75
20
5
−5
62.86
50
45
2
10.1
6
0.3
75.7
101
58


85
10
5
−5
62.3
50
45
2
9.9
6
0.3
75.8
99
58


60
5
35
−3
64.24
48
43
2
10.3
6
3.6
75.8
102
57


65
5
30
−3
65.03
48
43
2
10.7
6
3.1
76.0
107
58


70
5
25
−4
65.81
48
43
2
11.1
6
2.6
76.1
111
59


75
5
20
−4
66.61
49
44
2
11.4
5
2.1
76.2
116
59


80
5
15
−4
67.46
49
44
2
11.8
5
1.5
76.3
119
59


85
5
10
−4
68.28
49
44
2
12.2
5
1.0
76.3
125
61


90
5
5
−5
69.36
50
45
2
12.6
5
0.5
76.4
131
62


55
15
30
−3
64.35
48
43
2
10.5
6
3.0
75.9
102
56


65
15
20
−4
65.92
49
44
2
11.3
6
2.0
76.1
111
57


75
15
10
−4
67.56
49
44
2
12.1
5
1.0
76.3
119
59


80
15
5
−5
68.6
50
45
2
12.5
5
0.6
76.3
128
61


55
25
20
−4
65.33
49
44
2
11.0
6
2.1
76.0
107
56


65
25
10
−4
67.08
49
44
2
11.8
6
1.1
76.1
113
57


70
25
5
−5
67.91
50
45
2
12.2
5
0.7
76.2
124
60


45
35
20
−4
64.73
49
44
2
10.8
6
2.1
75.8
104
56


55
35
10
−4
66.47
49
44
2
11.6
6
1.2
76.0
108
55


60
35
5
−5
67.25
49
44
2
12.0
6
0.8
76.1
120
60


35
45
20
−4
64.04
49
44
2
10.5
6
2.1
75.7
101
56


45
45
10
−4
65.82
49
44
2
11.3
6
1.2
75.9
103
54


50
45
5
−5
66.56
49
44
2
11.7
6
0.8
76.0
116
59


35
55
10
−4
65.07
49
44
2
10.9
6
1.2
75.8
101
54


40
55
5
−5
65.79
49
44
2
11.4
6
0.9
75.9
113
59


25
65
10
−4
64.18
49
44
2
10.6
6
1.2
75.7
101
56


30
65
5
−5
64.93
49
44
2
11.0
6
0.8
75.9
109
58


15
75
10
−4
63.16
49
44
2
10.2
6
1.0
75.7
100
57


20
75
5
−5
63.97
49
44
2
10.6
6
0.8
75.8
105
58


10
85
5
−5
62.89
50
45
2
10.2
6
0.6
75.8
102
58


75
0
25
−3
57.94
48
43
2
10.7
5
3.8
76.5
103
53


80
0
20
−3
58
48
43
2
11.1
5
3.3
76.7
107
53


85
0
15
−4
57.95
49
44
2
11.6
5
2.6
77.0
112
53


90
0
10
−4
57.81
49
44
2
12.0
5
1.9
77.2
116
53


95
0
5
−4
57.56
50
45
2
12.4
5
1.0
77.4
121
54


75
5
20
−3
58.02
48
43
2
11.1
5
3.2
76.7
106
53


85
5
10
−4
58.08
49
44
2
11.9
5
1.9
77.1
115
53


65
15
20
−3
58.69
48
43
2
10.9
5
3.1
76.5
105
53


75
15
10
−4
58.65
49
44
2
11.8
5
1.9
76.9
113
53


80
15
5
−4
58.47
50
45
2
12.2
5
1.1
77.1
119
54


55
25
20
−4
59.16
48
43
2
10.8
5
3.0
76.3
103
53


65
25
10
−4
59.2
49
44
2
11.6
5
1.9
76.7
110
53


70
25
5
−4
58.97
50
45
2
12.0
5
1.2
76.9
117
54


45
35
20
−4
59.57
48
43
2
10.5
6
2.8
76.1
100
54


55
35
10
−4
59.74
49
44
2
11.4
5
1.8
76.5
106
52


60
35
5
−4
59.68
49
44
2
11.8
5
1.2
76.7
115
55


45
45
10
−4
60.12
49
44
2
11.1
5
1.7
76.3
103
53


50
45
5
−4
60.24
49
44
2
11.5
5
1.3
76.6
113
55


35
55
10
−4
60.63
49
44
2
10.8
6
1.7
76.2
104
54


40
55
5
−4
60.73
49
44
2
11.2
5
1.2
76.4
110
56


25
65
10
−4
60.94
49
44
2
10.5
6
1.5
76.0
102
56


30
65
5
−4
61.13
49
44
2
10.9
5
1.1
76.2
107
56


15
75
10
−4
61.06
49
44
2
10.1
6
1.2
75.9
100
56


20
75
5
−5
61.43
49
44
2
10.6
6
0.9
76.0
104
56


10
85
5
−5
61.49
50
45
2
10.2
6
0.7
75.9
101
57


75
5
20
−3
58.41
48
43
2
11.2
5
3.4
76.8
108
53


85
5
10
−4
58.18
49
44
2
12.1
5
2.0
77.2
118
54


90
5
5
−4
57.91
50
45
3
12.5
5
1.1
77.4
123
54


55
15
30
−3
59.31
47
42
2
10.6
5
4.4
76.4
101
53


65
15
20
−3
59.37
48
43
2
11.4
5
3.5
76.8
110
54


75
15
10
−4
59.08
49
44
2
12.2
5
2.1
77.2
120
54


80
15
5
−4
58.74
50
45
3
12.7
5
1.1
77.5
125
55


45
25
30
−3
60.48
47
42
2
10.7
5
4.4
76.3
103
54


55
25
20
−3
60.46
48
43
2
11.5
5
3.4
76.7
112
54


65
25
10
−4
60.16
49
44
2
12.4
5
2.0
77.2
122
55


70
25
5
−4
59.81
50
45
3
12.8
5
1.1
77.4
127
55


35
35
30
−3
61.69
47
42
2
10.8
5
4.3
76.2
105
55


45
35
20
−3
61.47
48
43
2
11.7
5
3.3
76.7
114
55


55
35
10
−4
61.37
49
44
2
12.5
5
2.0
77.1
124
56


60
35
5
−4
61
50
45
3
12.9
5
1.1
77.3
129
56


25
45
30
−3
62.98
48
43
2
10.9
6
4.0
76.1
107
56


35
45
20
−3
62.72
48
43
2
11.8
5
3.1
76.5
116
56


45
45
10
−4
62.69
49
44
2
12.6
5
1.8
77.0
126
57


50
45
5
−4
62.33
50
45
3
13.0
5
1.0
77.2
131
57


15
55
30
−3
63.93
48
43
2
10.9
6
3.8
76.1
108
57


25
55
20
−4
64.09
48
43
2
11.8
5
2.9
76.4
118
58


35
55
10
−4
64.07
49
44
2
12.6
5
1.7
76.9
127
58


40
55
5
−5
63.76
50
45
3
13.0
5
1.0
77.1
132
58


5
65
30
−3
64.82
48
43
2
10.8
6
3.4
76.0
109
58


15
65
20
−4
65.32
48
43
2
11.7
5
2.6
76.3
119
59


25
65
10
−4
65.46
49
44
2
12.6
5
1.6
76.7
128
59


30
65
5
−5
65.25
50
45
3
13.0
5
0.9
76.9
133
59


5
75
20
−4
66.57
49
44
2
11.6
5
2.3
76.2
119
60


15
75
10
−4
66.8
49
44
2
12.5
5
1.4
76.6
129
60


20
75
5
−5
66.77
50
45
2
13.0
5
0.8
76.7
134
61


5
85
10
−4
68.07
49
44
2
12.4
5
1.2
76.4
129
62


10
85
5
−5
68.23
50
45
2
12.9
5
0.7
76.6
134
62


5
90
5
−5
69.02
50
45
2
12.8
5
0.6
76.5
133
62


45
5
50
−5
62.67
49
44
2
9.6
6
0.5
75.9
98
59


55
10
35
−5
63.07
50
45
2
9.8
6
0.6
75.8
100
59


55
5
40
−5
63.38
50
45
2
9.9
6
0.4
75.9
101
59


65
20
15
−5
63.22
49
44
2
9.9
6
0.9
75.6
100
59


65
10
25
−5
63.82
50
45
2
10.1
6
0.5
75.7
103
60


65
5
30
−5
64.06
50
45
2
10.2
6
0.3
75.9
105
60


75
20
5
−5
63.91
50
45
2
10.1
6
0.7
75.6
102
59


75
10
15
−5
64.49
50
45
2
10.3
6
0.3
75.7
106
60


75
5
20
−5
64.85
50
45
2
10.4
6
0.2
75.8
107
61


85
10
5
−5
65.13
50
45
2
10.4
6
0.3
75.7
108
61


85
5
10
−5
65.58
50
45
2
10.5
6
0.1
75.8
109
61


90
5
5
−5
65.88
50
45
2
10.5
6
0.1
75.7
110
62


35
5
60
−4
63.28
49
44
2
9.7
6
1.3
76.1
99
59


45
20
35
−4
63.9
48
43
2
10.0
6
2.2
75.8
101
58


45
10
45
−4
64.3
49
44
2
10.2
6
1.6
76.0
104
59


45
5
50
−4
64.53
49
44
2
10.2
6
1.4
76.1
105
59


55
30
15
−3
64.44
48
43
2
10.3
6
3.1
75.7
102
58


55
20
25
−4
65.08
48
43
2
10.5
6
2.3
75.9
106
59


55
10
35
−4
65.49
49
44
2
10.7
6
1.6
76.0
109
60


55
5
40
−4
65.71
49
44
2
10.8
6
1.3
76.1
111
60


65
30
5
−3
65.26
48
43
2
10.6
6
3.1
75.9
107
58


65
20
15
−4
65.99
49
44
2
11.0
6
2.2
76.0
111
59


65
10
25
−4
66.58
49
44
2
11.2
6
1.5
76.1
115
60


65
5
30
−4
66.82
49
44
2
11.3
6
1.2
76.2
116
61


75
20
5
−4
66.78
49
44
2
11.4
6
2.1
76.1
116
60


75
10
15
−4
67.56
49
44
2
11.7
6
1.3
76.2
121
61


75
5
20
−5
67.86
49
44
2
11.8
5
1.0
76.2
122
61


85
10
5
−4
68.42
49
44
2
12.2
5
1.1
76.3
126
62


85
5
10
−5
68.71
50
45
2
12.3
5
0.7
76.3
128
62


90
5
5
−5
69.26
50
45
2
12.5
5
0.6
76.3
131
63

## Claims

1. A quasi-azeotropic composition consisting of:
a mixture of 5-30% by weight of 2,3,3,4,4,4-hexafluorobut-1-ene and 70-95% by weight of trans-1,3,3,3-tetrafluoropropene,

wherein the difference between the liquid saturation pressure and the vapor saturation pressure at a temperature of −5° C. is less than or equal to 10% of the liquid saturation pressure.

2. The composition as claimed in claim 1, which is non-flammable.

3. A heat-transfer composition, comprising the composition as claimed in claim 1 as heat-transfer fluid, and also one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof.

4. A heat transfer installation comprising a vapor compression circuit containing a composition as claimed in claim 1 as heat-transfer fluid optionally with one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof.

5. The installation as claimed in claim 4, chosen from mobile or stationary heat-pump heating, air-conditioning, refrigeration, freezing and Rankine cycle installations.

6. A process for heating or cooling a fluid or a body by means of a vapor compression circuit containing a heat-transfer fluid, said process successively comprising the evaporation of the heat-transfer fluid, the compression of the heat-transfer fluid, the condensation of the heat fluid and the depressurization of the heat-transfer fluid, in which the heat-transfer fluid is a composition as claimed in claim 1.

7. The process as claimed in claim 6, which is a process for cooling a fluid or a body, in which the temperature of the cooled fluid or body is from −15° C. to 15° C.; or which is a process for heating a fluid or a body, in which the temperature of the heated fluid or body is from 30° C. to 90° C.

8. A process for reducing the environmental impact of a heat-transfer installation comprising a vapor compression circuit containing an initial heat-transfer fluid, said process comprising a step of replacing the initial heat-transfer fluid in the vapor compression circuit with a final transfer fluid, the final transfer fluid having a lower GWP than the initial heat-transfer fluid, in which the final heat-transfer fluid is a composition as claimed in claim 1.

9. A quasi-azeotropic composition consisting of:
a mixture of 5-30% by weight of 2,3,3,4,4,4-hexafluorobut-1-ene and 70-95% by weight of trans-1,3,3,3-tetrafluoropropene.

10. The quasi-azeotropic composition as claimed in claim 9, which is non-flammable.

11. A heat-transfer composition, comprising the quasi-azeotropic composition as claimed in claim 9 as heat-transfer fluid, and also one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof.

12. A heat transfer installation comprising a vapor compression circuit containing a quasi-azeotropic composition as claimed in claim 9 as heat-transfer fluid optionally with one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof.

13. The installation as claimed in claim 12, chosen from mobile or stationary heat-pump heating, air-conditioning, refrigeration, freezing and Rankine cycle installations.

14. A process for heating or cooling a fluid or a body by means of a vapor compression circuit containing a heat-transfer fluid, said process successively comprising the evaporation of the heat-transfer fluid, the compression of the heat-transfer fluid, the condensation of the heat fluid and the depressurization of the heat-transfer fluid, in which the heat-transfer fluid is a quasi-azeotropic composition as claimed in claim 9.

15. The process as claimed in claim 14, which is a process for cooling a fluid or a body, in which the temperature of the cooled fluid or body is from −15° C. to 15° C.; or which is a process for heating a fluid or a body, in which the temperature of the heated fluid or body is from 30° C. to 90° C.

16. A process for reducing the environmental impact of a heat-transfer installation comprising a vapor compression circuit containing an initial heat-transfer fluid, said process comprising a step of replacing the initial heat-transfer fluid in the vapor compression circuit with a final transfer fluid, the final transfer fluid having a lower GWP than the initial heat-transfer fluid, in which the final heat-transfer fluid is a composition as claimed in claim 9.