B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/04 (2006.01) C08F 4/685 (2006.01) C08F 210/16 (2006.01)
Patent
CA 2271680
The present invention provides a Ziegler-Natta catalyst based on titanium and vanadium useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium. The catalysts of the present invention have a molar ratio of magnesium to the first aluminum component from 4.0:1 to 8.0:1 and molar ratio of magnesium to titanium and vanadium from 4.0:1 to 8.0:1. The invention provides a novel catalyst preparation method to substantially increase the polymer molecular weight in the high temperature ethylene polymerization process.
La présente invention concerne un catalyseur Ziegler-Natta à base de titane et de vanadium qui est utile dans les procédés de solution pour la polymérisation d'oléfines à faible teneur en magnésium et en aluminium. Les catalyseurs de la présente invention ont un rapport molaire de magnésium au premier composant d'aluminium allant de 4,0:1 à 8,0:1 et un rapport molaire de magnésium au titane et au vanadium allant de 4,0:1 à 8:1. L'invention concerne un nouveau procédé de préparation de catalyseur afin d'augmenter sensiblement la masse moléculaire du polymère dans le procédé de polymérisation d'éthylène à haute température.
Brown Stephen John
Jaber Isam
Nova Chemicals Corporation
Trott Trevor
LandOfFree
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