Patent GB-847339-A (GB)
Title: Metal-containing phosphosulphurised hydrocarbon derivatives
IPC: C07F9/04
Filed: 1958-12-02
Abstract: The invention comprises lubricating oil additives (see Group III) obtainable by phosphosulphurising an olefinic hydrocarbon polymer, such as a polyisobutene or degraded butyl rubber, steam stripping the product to remove substantially the unstable sulphur compounds therein, partially neutralising the stripped product with a metal oxide, hydroxide or carbonate such as a base of an alkali metal or of zinc, an alkali earth metal or other Group II metal, and reacting the product with an alkylene oxide or glycol such as ethylene or propylene oxide as a polyalkylene glycol.  Specification 792,553 is referred to.ALSO:The invention comprises lubricating oil additives (see Group III) obtainable by phospho sulphurising a hydrocarbon or mixture of hydrocarbons, for example by means of a phosphorus sulphide or mixture of phosphorus and sulphur, steam stripping the reaction product to remove substantially the unstable sulphur compounds therein, partially neutralising the stripped product with a metal oxide, hydroxide or carbonate and reacting it with an alkylene oxide or alkylene glycol.  The hydrocarbons utilisable include paraffins, olefines, diolefines, olefinic polymers, acetylenes and cyclic hydrocarbons, for example paraffin wax, petroleum fractions, petroleum resins and depolymerised butyl rubber.  The phospho sulphurising is normally effected with 1-10 moles of hydrocarbon at 90 DEG -320 DEG  C.; and desirably in an inert atmosphere ; the product may be filtered, if desired, after dilution with a mineral oil.  The steam stripping is generally effected at 100 DEG -200 DEG C., until the acid number of the product is above 25. The partial neutralisation is preferably effected to reduce the acid number to 12-18 with, for example, an alkali metal or Group II metal base.  The amount of alkylene oxide or glycol is generally such as will reduce the acid number to 5 or less; ethylene and propylene oxides and polyalkylene glycols are preferred.  The products may also be used as surface active agents, dispersing agents, flotation agents and anti-oxidising agents.  In an Example, polyisobutene is phospho sulphurised with P2S3, steamed, partially neutralised with zinc oxide and then reacted with ethylene oxide using a BF3-ether complex as catalyst.  Specification 792,553 is referred to.ALSO:Lubricating compositions comprise a mineral, animal, vegetable or synthetic oil and an additive obtainable by phospho sulphurising a hydrocarbon or mixture of hydrocarbons, steam stripping the product to remove substantially the unstable sulphur compounds therein, partially neutralising the stripped product with a metal oxide, hydroxide or carbonate such as a base of an alkali metal or of an alkaline earth metal, zinc or other Group II metal and reacting the partially neutralised product with an alkylene oxide or glycol such as ethylene or propylene oxide or a poly alkylene glycol.  The additives have detergent and E.P. properties and are preferably dissolved in the oil in amounts to give concentrates.  Other customary additives may also be present. An example illustrates the use in a paraffin oil of an additive obtained by phospho sulphurising a polyisobutene with P2S5, steam stripping the product, partially neutralising with zinc oxide and then reacting with ethylene oxide.  Specification 792,553 is referred to.