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US 5,328,877 AGranted
Solid alkene polymerization catalyst components and process for their preparation
AssigneeShell Oil Company
InventorsJohn C. Chadwick, Alan Villena, Ronald P. C. Van Gaalen
Life of this patent
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Abstract
A solid catalyst component for alkene polymerization comprising a magnesium halide, an electron donor and a phenoxy-titanium halide, the latter being a dihalophenoxy-titanium halide or a dialkoxyphenoxy-titanium halide in which the alkoxy groups each have from 1 to 8 carbon atoms.
Claims14
A process for preparing a solid catalyst component which comprises:
- a) halogenating, in the presence of an electron donor, a magnesium compound of the formula MgRR'.nCO.sub.2 wherein R is alkoxy or aryloxy, R' is halogen, alkoxy or an aryloxy group and n is a number from 0 to 2, with a halide of tetravalent titanium,
- b) contacting said halogenated product with a halide of tetravalent titanium,
- c) contacting the resulting product with TiCl.sub.3 OAr where Ar is dihalophenyl or dialkoxyphenyl and
- d) recovering the solid product from the reaction mixture.
1 more element
A process for preparing a solid catalyst component which comprises:
- (a) contacting a magnesium compound of the formula MgRR'.nCO.sub.2 wherein R is alkoxy or aryloxy group, R' is halogen, alkoxy or aryloxy group and n is a number from 0 to 2, with titanium tetrachloride in the presence of an aromatic ester electron donor and optional inert hydrocarbon or halohydrocarbon diluent to produce a halogenated product,
- (b) contacting said halogenated product with a halide of tetravalent titanium,
- (c) contacting the product of step (b) with TiCl.sub.3 --OAr, where Ar is dialkoxyphenyl or dihalophenyl, and
- (d) recovering the solid product of step (c) from the reaction mixture.
1 more element
Dependencies are inferred from the claim text.