Patent ID: 7214642
Filing Date: 2007-05-08
Classification: B01J,C08F

Abstract:
1. A method of preparing a polymerization catalyst comprising: contacting a support comprising alumina with a sulfating agent; adding a catalytic metal to the support prior to, concurrent with, or after contacting the support with the sulfating agent, wherein adding the catalytic metal to the support consists essentially of contacting the support with a separate chromium compound; and recovering the polymerization catalyst, wherein the polymerization catalyst is capable of producing polyethylene homopolymers or copolymers, further comprising selecting a cocatalyst from the group consisting of an alkylaluminum, alkylboron, alkyl zinc, alkyl magnesium, alkyl lithium, an organohydrosilane, and combinations thereof and combining the cocatalyst with the polymerization catalyst.