Polyethylene polymerization catalyst and process

Details Polyethylene polymerization catalyst and process Polyethylene polymerization catalyst and process

C - Chemistry, Metallurgy

08

F

C08F 4/69 (2006.01) C08F 4/02 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2192722

A chromium ("Cr")-containing catalyst which is supported on a particulate metal oxide that has been treated with an alkyl aluminum is used to polymerize high density polyethylene having a comparatively low melt index. Alternatively, the subject catalyst may be efficiently employed at a comparatively high reaction temperature, especially in a gas phase polymerization process, to produce polyethylene having a conventional melt index.

Un catalyseur contenant du chrome (Cr) qui est supporté par un oxyde métallique sous forme de particule qui a été traité avec un alkylaluminium est utilisé pour polymériser du polyéthylène haute densité ayant un indice de fluage relativement faible. Autre possibilité, le catalyseur en question peut être employé efficacement à une température de réaction relativement élevée, particulièrement dans un procédé de polymérisation en phase gazeuse, pour produire du polyéthylène ayant un indice de fluage usuel.

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