Patent ID: 7705097
Filing Date: 2010-04-27
Classification: C08F

Abstract:
1. A process for preparing a supported catalyst for the polymerization and/or copolymerization of olefins, the supported catalyst comprising a chromium content of from 0.01 to 5% by weight, based on the element in the finished catalyst, the process comprising: (a) preparing a homogeneous solution comprising an organic or inorganic chromium compound and at least one further organic or inorganic Zr compound in a protic or aprotic polar organic solvent; (b) bringing an amount of solution from (a) into contact with a finely divided inorganic support having a pore volume to form a catalyst precursor; (c) optionally removing the solvent from the catalyst precursor; and (d) calcining the catalyst precursor at a temperature of from 350 to 1050° C. under oxidative conditions.