Patent ID: 7592286
Filing Date: 2009-09-22
Classification: C08F

Abstract:
1. A process for preparing a catalyst component supported on MgCl 2 by contacting a Mg compound selected from Lewis adducts of formula MgX 2 (R″OH) m in which the R″ groups are C1-C20 hydrocarbon groups, X is chlorine and m is from 0.1 to 6; a Ti compound; and an electron donor compound (ED) selected from alcohol, alkyl esters of C1-C20 aliphatic carboxylic acids, ketones, amines, amides, nitriles, alkoxysilanes and aliphatic ethers as essential compounds, said process comprising reacting in at least two reaction steps at least one of said essential compounds as fresh reactant alone or in a mixture in which it constitutes a main component, wherein the Lewis adduct is first reacted with the Ti compound, thereby obtaining a solid intermediate, the solid intermediate is isolated, and in the last of said at least two reaction steps the solid intermediate is then contacted with the electron donor compound (ED) as fresh reactant.