Shape-shifted magnesium alkoxide component for polymerizing olef

Catalyst – solid sorbent – or support therefor: product or process – Forming or treating a sphere – process only – Forming other than by liquid immersion

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502104, 502107, 502110, 502111, 502115, 502120, 502125, 5261245, 5261246, 5261254, 5261258, 526908, 423159, 423161, C08F 4656

Patent

active

055676650

ABSTRACT:
A process is provided for preparing a shape-shifted catalyst component comprising (1) contacting a dihydrocarbyloxide magnesium compound with carbon dioxide in the presence of a slurrying agent to form a slurry of a carboxylated dihydrocarbyloxide magnesium compound; (2) adding a filler to the slurry either before or after the carboxylation of step (1); (3) spray drying the slurry of step (2) to evaporate the slurrying agent and to produce solid particles of the carboxylated dihydrocarbyloxide magnesium compound incorporating the filler; and, optionally, (4) heating the solid particles to remove carbon dioxide to produce a shape-shifted dihydrocarbyloxide magnesium compound component. A catalyst system using the component and a polymerization process employing the catalyst system are also provided.

REFERENCES:
patent: 4540679 (1985-09-01), Arzoumanidis et al.
patent: 4612299 (1986-09-01), Arzoumanidis et al.
patent: 4728705 (1988-03-01), Nestlerode et al.
patent: 5034361 (1991-07-01), Job et al.
Boor, Jr., John, Ziegler-Natta Catalysts and Polymerizations, Academic Press, New York, 1979, pp. 602-609.

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