Catalysts for olefin polymerization
AssigneePhillips Petroleum Company
InventorsTed M. Pettijohn, William K. Reagen, Shirley J. Martin
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Abstract
Olefins can be polymerized in the presence of a catalyst system composition comprising chromium oxides supported on a inorganic oxide support, a pyrrole-containing compound and a non-hydrolyzed metal alkyl. The use of this type of polymerization catalyst in a polymerization process can produce an olefin comonomer in-situ, resulting in polymers having decreased density and increased branching.
Claims21
A catalyst system composition comprising:
- (a) chromium oxide supported on an inorganic oxide support;
- wherein said chromium supported on an inorganic oxide support has been oxidized at a temperature within a range of about 300.degree. to about 1000.degree. C. for a time within a range of about 30 minutes to about 50 hours;
- (b) a pyrrole-containing compound;
- and
- (c) a non-hydrolyzed metal alkyl.
A catalyst system composition comprising:
- (a) chromium oxide supported on an inorganic oxide support;
- (b) hydrogen pyrrolide;
- and
- (c) triethylaluminum.
A catalyst system composition consisting essentially of:
- (a) chromium oxide supported on an inorganic oxide support;
- (b) a pyrrole-containing compound;
- and
- (c) a non-hydrolyzed metal alkyl.
A catalyst system composition consisting essentially of:
- (a) chromium oxide supported on an inorganic oxide support;
- (b) hydrogen pyrrolide;
- and
- (c) triethylaluminum.
Dependencies are inferred from the claim text.