Catalyst system for use in ethylene polymerization and copolymerization and process for preparing the same

A catalyst system for use in ethylene polymerization or copolymerization comprising:

• (a) a titanium containing solid catalyst component;
• and
• (b) an organic aluminum compound,
• wherein the molar ratio of aluminum in component b) to titanium in component a) is from 5 to 1,000, and wherein the titanium containing solid catalyst component is produced by a process consisting essentially of:
• dissolving a magnesium halide, a co-precipitator, and an alcohol electron donor activator in a solvent composition comprising organic epoxy compounds and organic phosphorous compounds to form a magnesium halide solution;
• and
• adding a titanium compound selected from the group having general formula TiXn(OR)4-n, wherein X is a halogen, R is a hydrocarbyl group, and n is from 0 to 4, to form a precipitate;
• and
• washing the precipitate,
• wherein the co-precipitator is selected from the group consisting of organic acids, organic anhydrides, ketones, and mixtures thereof.

A catalyst system for use in ethylene polymerization or copolymerization, comprising:

• (a) a titanium containing solid catalyst component;
• and
• (b) an organic aluminum compound,
• wherein the molar ratio of aluminum in component b) to titanium in component a) is from 5 to 1,000, and wherein the titanium containing solid catalyst component is produced by a process consisting essentially of:
• providing a solution of magnesium halide in a solvent composition comprising at least one organic compound selected from the group consisting of methylglycidyl ether, diglycidyl ether, tetrahydrofuran, and organic phosphorous compounds;
• dissolving an alcohol electron-donor activator in the solution to form a homogeneous solution;
• adding a co-precipitator into the homogeneous solution, followed by:
• adding a titanium compound having general formula TiXn(OR)4-n, wherein X is a halogen, R is a hydrocarbyl group, and n is from 0 to 4, to form a precipitate;
• and
• washing the precipitate,
• wherein the co-precipitator is selected from the group consisting of organic acids, organic anhydrides, ethers, ketones, and mixtures thereof.

A catalyst system for use in ethylene polymerization or copolymerization, comprising:

• (a) a titanium containing solid catalyst component;
• and
• (b) an organic aluminum compound,
• wherein the molar ratio of aluminum in component b) to titanium in component a) is from 5 to 1,000, and wherein the titanium containing solid catalyst component is produced by a process consisting essentially of:
• dissolving a magnesium halide, a co-precipitator, and an alcohol electron donor activator in a solvent composition comprising at least one organic compound selected from the group consisting of methylglycidyl ether, diglycidyl ether, tetrahydrofuran, and organic phosphorous compounds to form a magnesium halide solution;
• and
• adding a titanium compound having general formula TiXn(OR)4-n, wherein X is a halogen, R is a hydrocarbyl group, and n is from 0 to 4, to form a precipitate;
• and
• washing the precipitate,
• wherein the co-precipitator is selected from the group consisting of organic acids, organic anhydrides, ethers, ketones, and mixtures thereof.