Production of broad molecular weight polyethylene

Details Production of broad molecular weight polyethylene Production of broad molecular weight polyethylene

B - Operations, Transporting

01

J

B01J 31/00 (2006.01) C08F 10/00 (2006.01) C08F 110/02 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2508771

The present invention is directed to the use of aluminum alkyl activators and co~-catalysts to improve the performance of chromium-based catalysts. The aluminum alkyls allow for the variable control of polymer molecular weight, control of side branching while possessing desirable productivities, and may be applied to the catalyst directly or separately to the reactor. Adding the alkyl aluminum compound directly to the reactor (in-situ) eliminates induction times.

La présente invention concerne l'utilisation d'activateurs d'aluminium alkyles et des cocatalyseurs qui permettent l'amélioration des performances de catalyseurs à base de chrome. Les aluminium alkyles permettent la régulation variable du poids moléculaire des polymères, la régulation de la ramification latérale tout en ayant des productivités souhaitées, et peuvent être appliqués au catalyseur directement ou séparément dans le réacteur. L'adjonction du composé d'aluminium alkyle directement dans le réacteur (in situ) permet de supprimer les temps d'induction.

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