CATALYTIC HYDROCRACKING WITH A MIXTURE OF METAL HALIDE AND ANHYDROUS ACID

摘要

1469773 Hydrocracking EXXON RESEARCH & ENG CO 22 Dec 1973 [22 Dec 1972] 58521/73 Heading C5E [Also in Division B1] Hydrocarbons that boil at 400‹ F. or above are cracked in the presence of hydrogen or of a hydrogen donor in contact with a catalyst comprising (a) a fluoride, chloride, bromide or iodide of Al, Ga, Sn, Pb, V, Nb, Ta, As, Cr, Mo, W, rare-earth metal or actinide, and (b) at least an equimolar amount of a proton source which is HF, H, Cl, H, Br, HI, R a X b QO c (where R is hydrogen, alkyl up to butyl, cycloalkyl up to C 10 or aryl up to C 10 , Q is phosphorus or sulphur, O is oxygen, a is from 1 to 4, and b and c are each from 0 to 6), trifluoromethansulphonic acid, trifluoracetic acid or bis-(perfluoromethylsulphonyl) methane. The temperature of cracking may be 20‹ to 220‹ C. and the pressure 25 to 3000 p.s.i.g. If the feedstock contains sulphur compounds or aromatics, the catalyst is used in quantity to provide a molar excess of metal halide over the sulphur compounds and aromatics. Materials cracked in the examples are: (1) a typical hydrocracker feed boiling at 430-750‹ F.; (2 and 3) solutions of anthracene in normal pentane.