Patent GB-750205-A (GB)
Title: A process for the isomerisation of waxy hydrocarbons
IPC: C10G45/60
Filed: 1954-03-29
Abstract: Hydrocarbon mixtures containing at least 20 per cent by weight of waxy hydrocarbons are catalytically isomerized by passing the mixture in the presence of hydrogen at a temperature of 350-450 DEG  C. and under a pressure of 10-40 atmospheres in contact with a catalyst consisting of one or more metals or compounds of metals of Group 6A or 8 of the Periodic System, excluding the platinum metals, applied to an acid carrier.  The acid nature of the catlyst may be produced or intensified by applying a hydrogen fluoride treatment to the catalysts which may be nickel sulphide-tungsten sulphidealumina - fluorine, nickel - silica - alumina, cobalt - silica - alumina, cobalt - molybdenum oxide - alumina - fluorine, nickel - silica - magnesium oxide, nickel - boron oxide - alumina, molybdenum - alumina - fluoride or molybdenum - boron oxide - alumina.  The hydrogen may be in the form of a hydrogen containing gas and the liquid passed in the "trickle technique" in a thin layer over lumps of a catalyst arranged as a fixed bed.  Contact time is preferably 0.5 to 6 minutes, throughput rate 5 kilograms per litre of catalyst per hour and the molar ratio of hydrogen to hydrocarbon mixture is from 10:1 to 60:1.  In an example a catalyst containing 10 per cent by weight of molybdenum trioxide on alumina containing 0.5 per cent of fluorine was used, and a paraffin wax fraction melting at 41 DEG  C. was passed at the rate of 2.5 kgs. per litre of catalyst per hour together with 52 mols. of hydrogen per mol. of paraffin wax at 425 DEG  C. under a pressure of 35 atmospheres over it. Specifications 634,602 and 713,910, [Group III], are referred to.ALSO:Hydrocarbon mixtures containing at least 20 per cent by weight of waxy hydrocarbons are catalytically isomerized by passing the mixture in the presence of hydrogen at a temperature of 350-450 DEG C. and under a pressure of 10-40 atmospheres in contact with a catalyst consisting of one or more metals or compounds of metals of Group 6A or 8 of the Periodic System, excluding the platinum metals, applied to an acid carrier.  The acid nature of the catalyst may be produced or intensified by applying a hydrogen fluoride treatment to the catalysts which may be nickel sulphide -tungsten sulphide - alumina - fluorine, nickel - silica - alumina, cobalt - silica - alumina, cobalt - molybdenum oxide - alumina - fluorine, nickel - silica - magnesium oxide, nickel - boron oxide - alumina, molybdenum - alumina - fluorine or molybdenum - boron oxide - alumina.  The hydrogen may be in the form of a hydrogen containing gas and the liquid passed in the "trickle technique" in a thin layer over lumps of a catalyst arranged as a fixed bed.  Contact time is preferably 0.5 to 6 minutes, throughput rate 5 Kilograms per litre of catalyst per hour and the molar ratio of hydrogen to hydrocarbon mixture is from 10:1 to 60:1.  In an example a catalyst containing 10 per cent by weight of molybdenum trioxide on alumina containing 0.5 per cent of fluoride was used, and a paraffin wax fraction melting at 41 DEG C. was passed at the rate of 2.5 Kgs. per litre of catalyst per hour together with 52 mols. of hydrogen per mol. of paraffin wax at 425 DEG C. under a pressure of 35 atmos. over it. Specifications 634,602 and 713,910 are referred to.