Low temperature hydrocarbyloxide treatment of catalyst

Details Low temperature hydrocarbyloxide treatment of catalyst Low temperature hydrocarbyloxide treatment of catalyst

B - Operations, Transporting

01

J

252/102, 402/385

B01J 23/26 (2006.01) C08F 10/00 (2006.01) C08F 210/16 (2006.01)

Patent

CA 1073891

Abstract of the Disclosure A process for producing a catalyst comprising activating a supported chromium oxide at a temperature within the range of 500-2000°F; thereafter treating said thus-activated catalyst with from 0.5-10 weight percent, based on the weight of said catalyst of a hydrocarbyl aluminum hydrocarbyloxide at a temperature below 80°F. Ethylene homopolymers and copolymers are made in a particle form process over a catalyst which is treated as a relatively low temperature with aluminum hydrocarbyloxide. This catalyst is capable of pro- ducing high melt flow polymer at lower temperatures and also produces polymer having exceptionally high shear response. This catalyst is useful for produc- ing ethylene homopolymers and copolymers in a particle from process. There are certain applications where it is necessary to have properties such as high shear response of the type which can be obtained with solution process polymers. In accordance with the invention, such a polymer can be produced in slurry systems utilizing the catalyst made as described hereinabove.

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