Patent ID: 9593182
Date: 2017-03-14
CPC Classifications: C08F

Claim:
1. A process for preparing a solid catalyst component for use in olefinic polymerization, said process comprising the following steps: (a) dissolving a magnesium compound and an auxiliary intermediate electron donor in at least one first solvent to form a first mixture; (b) contacting a first titanium compound with said first mixture to form a precipitate of the magnesium compound and the first titanium compound; (c) separating the precipitate from said first mixture and removing side products from the precipitate prior to step (d) by washing the precipitate with a second mixture comprising a second titanium compound and at least one second solvent at a wash temperature below 90° C. to generate a washed precipitate, wherein said washing is performed without performing any intervening washes or reactions of the precipitate in between said separating and said washing; and (d) activating the washed precipitate by treating the washed precipitate with a third mixture of a third titanium compound and at least one third solvent at an activation temperature of 90-150° C. to form the solid catalyst component.