Multiple site olefin polymerization catalysts and methods

Details Multiple site olefin polymerization catalysts and methods Multiple site olefin polymerization catalysts and methods

C - Chemistry, Metallurgy

08

F

C08F 4/76 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2070496

MULTIPLE SITE OLEFIN POLYMERIZATION CATALYSTS AND METHODS ABSTRACT OF THE DISCLOSURE 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 and washing 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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