Abstract

A process is described herein for improving the soluble polymer production of, while maintaining substantially the same crystalline polymer yield of, a high surface area, large porosity, brown catalyst component comprising beta titanium trichloride and some of at least one organic electron pair donor compound, which component is prepared by (a) organoaluminum compound reduction of titanium tetrachloride followed by (b) incorporation of the reduced solid with said donor compound and thereafter (c) treatment with titanium tetrachloride. The improved process comprises treatment at ambient temperature or somewhat above with an additional organic electron pair donor compound such as an ester, an amine, an organic borate or a coordinating, cyclic hydrocarbon containing at least one double bond, etc., after (b) or (c) above and prior to use of said component in polymerization.