Patent ID: 9068027
Filing Date: 2015-06-30
Classification: C08F

Abstract:
1. A method comprising: contacting a silica support material consisting essentially of silica with a sulfating agent to form a sulfated silica support material comprising sulfate anions; thermally treating the sulfated silica support material to form a thermally treated sulfated silica support material; contacting the thermally treated sulfated silica support material with a chromium-containing compound to form a mixture; thermally treating the mixture to form a polymerization catalyst wherein the polymerization catalyst has a sulfate anion content of from about 0.1 wt. % to about 3.0 wt. %; contacting a monomer with the polymerization catalyst under conditions suitable for the formation of a polymer; and recovering the polymer wherein the polymer has a weight average molecular weight that is decreased by from about 5% to about 99% when compared to the weight average molecular weight of a polymer obtained from an otherwise identical catalyst made in the absence of the sulfating agent.