C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 4/22 (2006.01) C08F 4/24 (2006.01) C08F 4/52 (2006.01) C08F 4/69 (2006.01) C08F 10/02 (2006.01) C08F 210/16 (2006.01)
Patent
CA 2349834
The present invention relates to a process for polymerizing ethylene, optionally with at least one other olefin, in a polymerization zone using a catalyst and a cocatalyst. The catalyst comprises 0.5-5 weight percent chromium on a support comprising silica, in major part, and 3.5-10 weight percent titanium (based on the weight of said support). The support has a surface area of 400-800 m2/g and a pore volume of 1.8-4 cc/g. The catalyst has been activated in an oxidizing ambient at a temperature in the range of 315- 593°C. The cocatalyst is an organoboron compound having the formula B(X)3, wherein (X) is a hydrocarbyl having 1-20 carbon atoms. The cocatalyst is used in the amount of 1-15 ppm by weight of diluent before entry into the polymerization zone. Said polymerizing is conducted at a temperature of 90.5°C-107°C.
L'invention porte sur un procédé d'obtention d'un polymère consistant à polymériser de l'éthylène, ou à polymériser de l'éthylène et au moins une autre oléfine.
Benham Elizabeth A.
Bergmeister Joseph J.
Guenther Gerhard
Mcdaniel Max P.
Secora Steven J.
Finlayson & Singlehurst
Phillips Petroleum Company
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