Olefin polymerization catalyst from trialkylaluminum...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/642 (2006.01) C08F 4/68 (2006.01) C08F 4/685 (2006.01) C08F 10/00 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2067177

A high activity alumoxane-metallocene supported catalyst for the polymerization of 1-olefins prepared by reacting undehydrated silica gel with a mixture of trimethylaluminum and triisobutylaluminum to produce a silica-alumoxane product which is then reacted with a Group IVB and/or Group VB metallocene to produce an active catalyst which may be obtained in powder form, suitable for use in gas or slurry phase reactors, by a removal of solvents and drying.

Un catalyseur très actif, à support d'alumoxane-métallocène, pour la polymérisation de 1-oléfines est préparé en faisant réagir un gel de silice non déshydraté avec un mélange de triméthyle aluminium et de triisobutylealuminium pour obtenir un produit de silice-alumoxane que l'on fait réagir ensuite avec un métallocène du groupe IVB et/ou du groupe VB de manière à obtenir un catalyseur actif sous forme de poudre appropriée à une utilisation dans des réacteurs de phase gazeuse ou boueuse, par élimination de solvants et par séchage.

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