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AssigneePhillips Petroleum Company
InventorsKent E. Mitchell, Paul F. Schubert, Gil R. Hawley
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A polymerization catalyst useful for the polymerization of olefins is prepared by contacting a metal dihalide compound having a metal selected from Group 2 and Group 12 of the Periodic Table and a transition metal compound which is a hydrocarbyloxide of a transition metal selected from Group 4 and Group 5 to thereby form a first catalyst component; contacting the first catalyst component with at least one organoaluminum precipitating agent to form a solid product; and contacting the solid product with an ester and then an activating agent to form a catalyst. Other aspects of the invention include a catalyst produced by the above described process and a polymerization process employing the thus produced catalyst.
A process for preparing a catalyst suitable for the polymerization of olefins comprising:
A process for preparing a catalyst comprising:
Dependencies are inferred from the claim text.