Morphology-controlled olefin polymerization catalyst

Details Morphology-controlled olefin polymerization catalyst Morphology-controlled olefin polymerization catalyst

1989-08-21

1990-08-07

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...

502118, 502121, 502122, 502123, 502124, 502125, 502127, 502133, C08F 464

Patent

active

049468162

ABSTRACT:
In a solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprising the product formed by (A) forming a solution of a magnesium-containing species from a magnesium alkyl (or hydrocarbyl) carbonate or a magnesium carboxylate; (B) precipitating solid particles from such magnesium-containing toluene-based solvent by treatment with a transition metal halide and an organosilane; (C) reprecipitating such solid particles from a mixture containing a cyclic either; and (D) treating the reprecipitated particles with a transition metal compound and an electron donor, the morphology of such component is modified by incorporating a morphology-affecting amount of C.sub.8 -C.sub.10 aromatics within the toluene-based solvent in Step B, Step A, in Step C prior to addition of ether, or combinations thereof.

REFERENCES:
patent: 4540679 (1985-09-01), Arzoumanidis et al.
patent: 4612299 (1986-09-01), Arzoumanidis et al.
patent: 4866022 (1989-09-01), Arzoumanidis et al.

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