Process for preparing polyolefins

Details Process for preparing polyolefins Process for preparing polyolefins

C - Chemistry, Metallurgy

08

F

402/431, 402/641

C08F 4/52 (2006.01) C08F 4/02 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1078806

ABSTRACT OF THE DISCLOSURE Improved catalysts are provided for use in the polymer- ization or copolymerization of olefins. In addition, a process is provided for preparing polyolefins by polymerizing or co- polymerizing olefins using such catalysts. The process for preparing polyolefins by polymerizing or copolymerizing olefins involves using, as a catalyst, a novel titanium-containing solid and an organoaluminum compound and/or an organozinc com- pound. The titanium-containing solid comprises a reaction product obtained by copulverizing (1) a magnesium halide and/or a manganese halide, (2) an aromatic hydrocarbon selected from the group consisting of polycyclic aromatic hydrocarbons, homo- cyclic hydrocarbons, and halogen- and alkyl-substituted prod- ucts thereof, and (3) tetravalent and/or trivalent titanium compounds, wherein the ratio of the halide selected from at least one of the magnesium halide and manganese halide and the aromatic hydrocarbon is within the range of 1:0.5 to 1:0.01, and the titanium content of the solid is within the range of 0.5 to 10 weight percent. This process provides a polyolefin with a high bulk density in high yield.

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