Patent ID: 6096681
Filing Date: 2000-08-01
Classification: C08F

Abstract:
Procedure for the preparation of a solid carrier for olefin polymerization catalysts, comprising the steps:(a) impregnating a silica with a solution of Mg-chloride in the presence of electron donors,(b) drying the impregnated silica obtained in (a) and impregnating it with a solution of Mg-alkyls in SiCl.sub.4 at a temperature from -10 to 20.degree. C., optionally adding a further amount of electron donors, to form a slurry,(c) subsequently treating the slurry obtained in (b) at a temperature from 40.degree. C. to reflux temperature, to form a treated carrier slurry,(d) drying the treated carrier slurry obtained in (c) to form said solid carrier.