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SOLVENT, ADDITIVE AND CO-CATALYST EFFECTS FOR ETHYLENE OLIGOMERIZATION CATALYSIS

United States Patent Application

20090118117
A1
View the Complete Application at the US Patent & Trademark Office
The invention is directed to catalyst systems for the oligomerization of ethylene. In some embodiments, the catalyst system includes ethylene, a solvent, and a catalyst activated with an aluminoxane co-catalyst. The system may further include an additive. Various modifications to the different reaction parameters may be made to fine-tune the reaction properties, such as productivity, activity and selectivity for a particular oligomer. For example, the solvent may be modified to include a mixture of at least two solvents. Alternatively, the co-catalyst may be modified by aging or partially fluorinating the co-catalyst. In another alternative, an additive may be included in the reaction system. Each modification to the reaction system effects a different reaction outcome, thereby enabling fine-tuning of the reaction properties by varying the modifications to the reaction system.
Elowe, Paul R. (Midland, MI), Bercaw, John E. (Pasadena, CA)
12/ 243,904
October 1, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] The U.S. Government has certain rights in this invention pursuant to Grant No. DE-FG02-85ER13431 awarded by the Department of Energy.