Gas phase olefin polymerizations using dual donor catalyst...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 10/00 (2006.01) C08F 2/34 (2006.01) C08F 10/06 (2006.01) C08F 110/06 (2006.01) C08F 210/06 (2006.01)

Patent

CA 2470531

A gas-phase olefin polymerization process in a plug flow reactor uses a catalyst system containing a magnesium halide supported titanium-containing component, an organoaluminum component, and at least one external electron donor component; in the process a first external donor component is added to the reactor at an injection point axially near an injection point for the supported transition metal containing component, and at least a second external donor component is added to the reactor axially downstream from the injection point for the first external donor component.

L'invention concerne un procédé de polymérisation d'oléfines en phase gazeuse dans un réacteur à écoulement piston qui utilise un système catalytique contenant un composant renfermant du titane supporté par du halogénure de magnésium, un composant d'organoaluminium et au moins un composant donneur d'électrons externe. Le procédé consiste à ajouter un premier composant donneur d'électrons au réacteur au point d'injection situé dans le sens axial à proximité d'un point d'injection pour le composant contenant du métal de transition supporté, et à ajouter au moins un second composant donneur d'électrons externe au réacteur situé dans le sens axial en aval du point d'injection pour le premier composant donneur externe.

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