Gas phase fluidized bed polyolefin polymerization process...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 2/34 (2006.01) B01J 8/00 (2006.01) B01J 8/24 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2153921

An improved method for polymerizing one or more polyolefins in the presence of a transition metal catalyst in at least one gas phase reactor having an expanded section, the improvement comprising generating a tangential flow of gas or gas-solids in the expanded section of the gas phase reactor to reduce fines entrainment into the gas cycle system and to reduce or remove solid particle build-up on one or more interior surfaces of the expanded section of the reactor.

Méthode améliorée de polymérisation d'une ou de plusieurs polyoléfines en présence d'un catalyseur à métal de transition dans au moins un réacteur de traitement en phase gazeuse doté d'une section élargie. Cette méthode permet de produire un écoulement tangentiel de gaz ou de gaz-solides dans la section élargie du réacteur, afin de réduire l'entraînement de fines dans le système de recyclage et de diminuer ou d'éliminer l'accumulation de particules solides sur une ou plusieurs surfaces intérieures de la section élargie du réacteur.

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