Preparation of olefin polymerization catalyst component

Details Preparation of olefin polymerization catalyst component Preparation of olefin polymerization catalyst component

C - Chemistry, Metallurgy

08

F

252/111

C08F 10/00 (2006.01) C08F 4/64 (2006.01)

Patent

CA 1311741

ABSTRACT Solid catalyst components for use in the polymerization of olefins and having improved activity and selectivity are prepared by: a) halogenating a magnesium compound containing at least one aryloxy, alkyl carbonate or alkyloxy group with a first halide of tetravalent titanium and a first electron donor; b1) contacting the resulting halogenated product with a second halide of tetravalent titanium; and c) washing a resulting treated halogenated product with an inert hydrocarbon liquid, wherein a second electron donor is used in step a) or step b1) and in that the product of step b1) is contacted in step b2 with a third halide of tetravalent titanium at a temperature of 40° to 140°C and thereafter the treated product is washed in step c).

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