Multiple site olefin polymerization catalysts

Details Multiple site olefin polymerization catalysts Multiple site olefin polymerization catalysts

1991-06-07

1992-10-13

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...

502114, 502115, 502119, 502120, C08F 464

Patent

active

051550792

ABSTRACT:
A multiple site solid catalyst component capable of producing polyolefins having a broad or multimodal molecular weight distribution, such as a bi-modal molecular weight distribution, is prepared by contacting a particulate solid support with a zirconium compound or complex to bind the zirconium compound or complex to the support, optionally followed by contacting the supported zirconium compound or complex with a Lewis acid to produce an intermediate product, optionally isolating and washing the supported zirconium compound or complex or resulting intermediate product to remove soluble by-products therefrom, and reacting the washed or unwashed supported zirconium compound or complex or intermediate product with a titanium or vanadium compound to produce a solid catalyst component.

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