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US 4,728,705 AGranted
Olefin polymerization catalyst composition
AssigneeShell Oil Company
InventorsSteven M. Nestlerode, Israel G. Burstain, Robert C. Job
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Abstract
Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a carbonized magnesium alkoxide or aryloxide component with a halogenated tetravalent titanium component, a halohydrocarbon component and an electron donor.
Claims14
A process for the catalytic polymerization of an alphaolefin by contact with a titanium-containing catalyst which contains a solid magnesium halide/titanium halide catalyst component containing no carbonate magnesium compound which has been obtained by
- (a) heating a carbonated magnesium compound of the formula MgR'R"xCO.sub.2 wherein R' is an alkoxide or aryloxide group, R" is an alkoxide group, aryloxide group or halogen, and x has a value between about 0.1 and 2.0 to a temperature above 100.degree. C. for a period of time sufficient to cause complete loss of CO.sub.2 ;
- (b) contacting the resulting product with a halide of tetravalent titanium in the presence of a halohydrocarbon and an electron donor;
- (c) contacting the resulting halogenated product with tetravalent titanium halide;
- (d) washing the resulting product to remove unreacted titanium compounds;
- and
- (e) recovering the solid products, and
- wherein the catalyst also contains an organoaluminum compound and a selectivity control agent.
4 more elements
Dependencies are inferred from the claim text.