Patent ID: 6887817

Claim:
An olefin polymerization catalyst, having a solid catalyst component and an organoaluminum compound, comprising: (A) a solid catalyst component being prepared by copulverizing a magnesium compound, said magnesium compound being represented by the general formula Mg(OR) 2-n X n wherein R is an alkyl radical containing up to 12 carbon atoms, 1â‰¦nâ‰¦2 and X is a halogen atom; an aluminum compound, said aluminum compound being represented by the general formula Al(ORâ€²) 3 wherein Râ€² is an alkyl radical containing up to 12 carbon atoms or an aryl group; an electron donor from organic compounds which contain at least one atom selected from oxygen, silicon, nitrogen, sulfur and phosphorus atoms, and a titanium compound; and (B) an organoaluminum compound.