Ethylene polymerization catalysts

摘要

The present invention relates to solid catalyst components comprising a reaction product of a titanium compound, a magnesium compound, an alcohol, an aluminum alkoxide, a siloxane mixture, and a maleate derivative; and catalyst systems comprising the solid catalyst components and organoaluminum compounds. The present invention also relates to methods of making the solid catalyst components and the catalyst systems, and methods of polymerizing or copolymerizing ethylene using the catalyst systems.

主权项

1. A process of producing a solid catalyst component for use in ethylene polymerization, the process comprising:
adding a magnesium compound, an aluminum alkoxide, and a first amount of a siloxane mixture into an alcohol solution to form a mixture; heating the mixture to form a magnesium solution; contacting the magnesium solution with a titanium compound; adding an additional amount of the siloxane mixture to form a liquid catalyst intermediate; heating the liquid catalyst intermediate to form catalyst intermediate particles; and contacting the catalyst intermediate particles with a maleate derivative to form the solid catalyst component.