Patent ID: 6818584
Filing Date: 2004-11-16
Classification: C08F

Abstract:
A process for the preparation of a Ziegler-Natta catalyst comprising the steps of:(I) reacting a magnesium hydrocarbyloxy compound with a chlorine-containing aluminum or boron compound in a non-polar hydrocarbon solvent in which said magnesium hydrocarbyloxy compound is soluble whereby to produce a solution (A); and then either; (II) (i) contacting the solution (A) with a chlorine containing tetravalent titanium compound to produce a solution (B); (ii) impregnating solution (B) into a porous particulate support; or (III) (iii) impregnating solution (A) into a porous particulate support; and (iv) contacting the solid support with a chlorine containing tetravalent titanium compound; or (IV) (v) impregnating solution (A) into a porous particulate support pretreated with a chlorine containing tetravalent titanium compound.