Patent ID: 8404789

Claim:
An olefin polymerization catalyst, comprising (1) an active magnesium halide, (2) a titanium compound having at least one Ti-halide bond, and (3) an electron donor selected from a group consisting of sulfonyl-containing compounds having the following formula: wherein X is one element selected from the group consisting of non-substituted or di-substituted elements of Group 14, non-substituted or mono-substituted elements of Group 15, and elements of Group 16; wherein the substituent groups are alkyl, alkynyl, mono-cycle, multi-cycle, or heterocycle groups; wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, halogen, alkyl, substituted alkyl, cyclo-alkyl, aryl, arylalkyl, alkylaryl, and heterocycle.