Gas phase fluidized bed polyolefin polymerization process...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 2/46 (2006.01) C08F 210/18 (2006.01)

Patent

CA 2153916

An improved method for polymerizing one or more polyolefins in the presence of a transition metal catalyst in at least one gas phase fluidized bed reactor, the improvement comprises generating at least one low frequency, high pressure sound wave inside a reactor system, which wave has sufficient frequency and pressure to dislodge and/or prevent particle build-up on interior surfaces of the reactor system.

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 à lit fluidisé. Cette méthode permet de produire au moins une onde sonore à haute pression et à basse fréquence, à l'intérieur du réacteur. La fréquence et la pression de cette onde sont suffisantes pour détacher les particules accumulées sur les surfaces intérieures du réacteur ou pour en diminuer l'accumulation.

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