Preparation of modified and activated chromocene catalysts for e

Details Preparation of modified and activated chromocene catalysts for e Preparation of modified and activated chromocene catalysts for e

1976-09-22

1978-07-18

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252430, 252431R, 526107, 526170, C08F 476, C08F 478

Patent

active

041014456

ABSTRACT:
Ethylene polymerization catalysts are prepared by depositing a chromocene compound on a support with a titanium compound and activating the final blend at 300.degree. C. to about 1000.degree. C. A fluoriding agent can be optionally added where a narrower molecular weight distribution of the polyethylene to be obtained is desired. Catalysts with good reproducibility, when prepared by this method, show particular utility in production of polyethylene by a fluid bed process.

REFERENCES:
patent: 3622521 (1971-11-01), Hogan et al.
patent: 3709853 (1973-01-01), Karapinka
patent: 3879362 (1975-04-01), Chalfont et al.
patent: 3879368 (1975-04-01), Johnson

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