Polymerisation process

C - Chemistry – Metallurgy – 08 – F

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C08F 10/00 (2006.01) C08F 4/639 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2277907

The polymerisation of olefins in the gas phase carried out in the presence of a catalyst system comprising (a) a metallocene and (b) an activator is improved by the addition of a lower alkane to the reactor. The preferred alkane is pentane and is preferably added to the reactor as a liquid. The activity of the catalyst system may be improved by the addition of the alkane.

L'invention concerne la polymérisation d'oléfines en phase gazeuse, effectuée en présence d'un système de catalyseur comprenant a) un métallocène, et b) un activateur. Ce procédé peut être amélioré grâce à l'ajout d'un alcane inférieur dans le réacteur. Cet alcane est de préférence du pentane, qui est de préférence ajouté audit réacteur sous forme liquide. L'activité du système de catalyseur peut être améliorée grâce à l'ajout dudit alcane.

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