Solid catalyst component for olefin polymerization catalysts

Details Solid catalyst component for olefin polymerization catalysts Solid catalyst component for olefin polymerization catalysts

1988-01-07

1989-06-13

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502105, 502129, 502133, 526125, C08F 464

Patent

active

048393215

ABSTRACT:
A solid catalyst component for olefin polymerization catalysts prepared by subjecting diethoxymagnesium (a), calcium chloride (b) and a silicon compound (c) of the general formula: Si(OR).sub.4 (wherein R is an alkyl or aryl group) together to a contact treatment in the presence of an organic solvent (d), suspending the treated composition in an aromatic hydrocarbon (e) which is liquid at normal temperature and bringing the suspension into a first contact with titanium tetrachloride (f) to form a product and bringing it to a second contact with titanium tetrachloride (f) in such manner that a diester (g) of an aromatic dicarboxylic acid is allowed to coexist at any stage of the above suspending and/or contacts with the exception of the contact treatment, the calcium chloride (b) being used in an amount of 1-2 g per gram of the diethoxymagnesium (a). This solid catalyst component exhibits, when applied to the polymerization of olefins, a surprisingly enhanced polymerization activity per titanium atom and a high stereospecific performance and scarcely necessitates any deashing treatment, thus affording a great economical advantage.

REFERENCES:
patent: 4328122 (1982-05-01), Monte et al.
patent: 4414132 (1983-01-01), Goodall et al.
patent: 4547476 (1985-10-01), Terano et al.
patent: 4678768 (1987-07-01), Fujita et al.
patent: 4686200 (1987-08-01), Terano et al.

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