Patent ID: 7875568

Claim:
A method for preparation of a supported nonmetallocene olefin polymerization catalyst comprising the steps of: reacting a carrier with a chemical activator selected from an IVB group metal halide to provide a modified carrier; dissolving a magnesium compound in a mixed solvent of tetrahydrofuran and alcohol to provide a magnesium compound solution, adding the modified carrier to the solution to obtain a suspension, then filtering, washing, and drying under suction the suspension to provide a composite carrier; reacting the composite carrier with a chemical treating agent to obtain a modified composite carrier; and reacting the modified composite carrier with a nonmetallocene olefin polymerization catalyst dissolved in a solvent to obtain a supported nonmetallocene olefin polymerization catalyst suspension, then filtering, washing and drying under suction the suspension to provide a supported nonmetallocene olefin polymerization catalyst.