| 摘要 |
1443008 Isomerizing hydrocarbons; catalyst for cracking hydrocarbons UOP Inc 27 Sept 1973 [28 Sept 1972 (3)] 45278/73 Heading C5E [Also in Division B1] Hydrocarbon feeds are converted, e.g. hydrocracked, hydrotreated and, in particular, isomerized in contact with a catalyst formed by reacting an alumina composite containing 0À1 to 5% wt. of a platinum group metal or nickel firstly with a Friedel-Crafts metal halide then, in a non-reducing atmosphere at 100-600‹ C., with a polyhalo compound which contains at least two halogen atoms on the same carbon or sulphur atom or is a boron trihalide. The isomerization may be effected at 65-235‹ C., a pressure of 1 to 140 atmos., a LHSV of 0À5 to 10 and a hydrogen to hydrocarbon mole ratio of 0À25 :1 to 20 : 1. The feed may be a C 4 -C 8 straight chain paraffin hydrocarbon, 2- or 3- methylpentane (to give 2,2- and 2,3-dimethylbutane) or a naphthene, e.g. dimethylcyclopentane (to give methylcyclohexane) or methylcyclopentane to cyclohexane. The Examples describe the isomerization of butane and of a mixed n-pentane/n-hexane feed to give isopentane and 2,2-dimethylbutane. Catalysts containing nickel as the Group VIII metal are suited to C 4 isomerization but not C 5 isomerization. The use of the catalyst for hydrocracking of heavy oils to form petroleum and LPG at up to 300‹ C. and a pressure of 5 to 70 atm. is also mentioned. |
