Process for the gas phase polymerisation of olefins

Details Process for the gas phase polymerisation of olefins Process for the gas phase polymerisation of olefins

C - Chemistry, Metallurgy

08

F

C08F 4/24 (2006.01) C08F 10/00 (2006.01) C08F 110/02 (2006.01)

Patent

CA 2303016

The present invention provides an improved chromium oxide based catalyst supported on a granular or microspherical refractory oxide for the gas phase polymerisation of at least one alpha olefin containing from 2 to 12 carbon atoms, characterised in that the supported chromium oxide based catalyst has been subjected to a sole calcination/activation step consisting of a single thermal treatment performed at a temperature ranging from 200 to 450 ~C under an oxygen- containing atmosphere.

La présente invention concerne un catalyseur amélioré de chrome à base d'oxyde, supporté sur un oxyde réfractaire granulaire ou microsphérique, afin d'effectuer la polymérisation en phase gazeuse d'au moins une alpha-oléfine renfermant 2 à 12 atomes de carbone. Ce catalyseur de chrome à base d'oxyde a été soumis à une étape préalable de calcination/d'activation, consistant en un traitement thermique réalisé à une température variant entre 200 et 450 ·C, dans une atmosphère contenant de l'oxygène.

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