| abstract |
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): nV (1), Ti (n), Cl (3n) nwhere n varies from 1 to 3, nand is prepared by reacting titanium tetrachloride with a vanadium arene [V°(arene)₂] (arene = benzene or mono-, di- or tri-alkyl substituted benzene) in accordance with the equation: nV°(arene)₂ + nTiCl₄ ----> VTi n Cl 4n + 2 arene npossibly 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. |