Magnesium-titanium-hafnium for high temperature polymerization

Details Magnesium-titanium-hafnium for high temperature polymerization Magnesium-titanium-hafnium for high temperature polymerization

C - Chemistry, Metallurgy

08

F

C08F 4/646 (2006.01) C08F 4/16 (2006.01) C08F 4/643 (2006.01)

Patent

CA 2629550

A magnesium titanium olefin polymerization procatalyst is prepared by A) reacting a diorganomagnesium compound with a source of active chlorine, (with the proviso that the amount of chlorine is insufficient to completely convert the diorganomagnesium to magnesium dichloride); then B) removing unreacted diorganomagnesium from the reaction product; then C) adding a tetravalent hafnium species to the washed MgCl2 support; then D) depositing a tetravalent titanium species on the supported Hf. This procatalyst is highly active for the solution polymerization of olefins when combined with a cocatalyst.

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