Process for polyolefins production

C - Chemistry – Metallurgy – 08 – F

Patent

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402/418, 402/423

C08F 4/62 (2006.01) C08F 2/34 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1168400

ABSTRACT OF THE DISCLOSURE A process for the homopolymerization or copolymerization of olefins is disclosed, which is carried out in the presence of an improved catalyst comprising a solid catalyst component and an organometal compound, said solid catalyst component being obtained by the reaction of: (a) a magnesium halide, (b) a compound represented by the formula: Me(OR)nXz-n where Me is any of the Group I-VIII elements of the Periodic Table, excluding A?, Si, Ti and V, R is a hydrocarbon residual group having 1 - 24 carbon atoms, X is a halogen atom, z represents the valence of Me and n is 0 < n ? z, and (c) a compound represented by the formula: Si(OR')mX4-m where R' is a hydrocarbon residual group having 1 - 20 carbon atoms, X is a halogen atom, and m is 0 ? m ? 4, and (a) a titanium compound and/or a vanadium compound. The resulting polymers are characterized by a large bulk density a narrow range of molecular weight distribution, and small amounts of hexane extraction.

402394

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