Process for producing alfa-olefin polymers

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 210/16 (2006.01) C08F 2/00 (2006.01) C08F 297/08 (2006.01) C08F 210/06 (2006.01)

Patent

CA 2372574

The present invention relates to a process for polymerizing .alpha.-olefins in at least two stages, the first stage comprising at least one bulk reactor and optionally at least one gas phase reactor for forming the .alpha.-olefin polymer matrix and the second stage comprising at least one additional gas phase reactor for copolymerization of ethylene with said polymer matrix. In the second stage an antifouling composition is fed into said gas phase reactor(s) for preventing fouling in the second stage.

La présente invention a trait à un procédé de polymérisation d' alpha -oléfines en au moins deux étapes, la première étape comportant au moins un réacteur principal et éventuellement au moins un réacteur en phase gazeuse pour former la matrice polymère d' alpha -oléfine, et la deuxième étape comportant au moins un réacteur en phase gazeuse supplémentaire pour copolymériser l'éthylène avec ladite matrice polymère. Au cours de la deuxième étape, une composition anti-encrassement est chargée dans le(s)dit(s) réacteur(s) en phase gazeuse pour prévenir un encrassement pendant la deuxième étape.

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