Ethylene polymerization catalysts

Details Ethylene polymerization catalysts Ethylene polymerization catalysts

C - Chemistry, Metallurgy

08

F

252/101, 402/634

C08F 4/62 (2006.01) B01J 27/18 (2006.01) C08F 10/00 (2006.01) C08F 110/00 (2006.01) C08J 5/18 (2006.01)

Patent

CA 1068048

Abstract of the Disclosure Novel catalysts are provided for the polymer- ization of olefins such as ethylene. The catalysts consist essentially of a chromium compound supported upon an in- organic carrier containing aluminum and phosphorous moieties, at least a portion of the chromium having a valence of less tan 6. The inorganic carrier is an amorphous precipitate of aluminum phosphorus or an amorphous precipitate containing aluminum and phosphorus moieties in an atomic ratio in the range of about 5:1 to 1:1. The catalyses are particularly useful for polymerizing ethylene in a Particle Form Process in that the catalyst has essentially no polymerization induction period and provides ethylene polymers having a desirably broad molecular weight distribution and a de- sirably high melt flow shear ratio.

259845

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