The catalyst component and catalyst for ethylene polymerization and for the copolymerization of ethylene with alpha-olefins

摘要

A solid catalyst component for the polymerization of ethylene and the copolymerization of ethylene with C3-C10 alpha-olefins, contains titanium, vanadium and chlorine, is substantially definable by the formula (in atomic proportions): V (1), Ti (n), Cl (3n) where n varies from 1 to 3, and is prepared by reacting titanium tetrachloride with a vanadium arene [V DEG (arene)2] (arene = benzene or mono-, di- or tri-alkyl substituted benzene) in accordance with the equation: V DEG (arene)2 + nTiCl4 ---- VTinCl4n + 2 arene possibly followed by treatment with an alkyl aluminium chloride. This catalyst component, when associated with a trialkyl aluminium, is highly active in the production of ethylene polymers and copolymers by low temperature, low pressure methods in suspension, or by high temperature, high pressure methods conducted in a tubular reactor or pressure vessel, or by high temperature methods conducted in solution.