Method of production of dimers of alpha - ethylenic hydrocarbon and dimers obtained

摘要

1,171,281. Dimerizing olefin. BRITISH PETROLEUM CO. Ltd. 29 Dec., 1966 [4 Jan., 1966], No. 287/66. Heading C5E. An alpha olefin is dimerized in the presence of a homogeneous catalyst comprising a reaction product of an aluminium halide and a transistion metal halide and in the presence of an organo aluminium compound at a temperature of - 100‹ to 200‹ C. and under such conditions of pressure that the reactants are maintained in the liquid or partially condensed phase. The transistion metal halide may be a halide of a Group VII or VIII metal. The preferred catalyst components are aluminium chloride and cobalt chloride. The organo aluminium compound may be Et 3 Al, Et 2 AlCl or Et 2 AlOEt. The molar ratio of Al in the organo aluminium compound to cobalt should preferably be at least 1 : 1. The aluminium halide and transition metal halide may be heated together in an organic solvent such as cyclohexane, benzene or chlorobenzene. Ethylene, propylene or butene- 1 may be dimerized under a pressure of 200-2000 p.s.i.g. and 3-methylpentene-1 and 4-methylpentene-1 may be dimerized at atmospheric pressure.