Carrier for olefin polymerization catalysts

US6096681A · kind A · utility

Assignee

• Borealis AG · AT

Inventors

• Luciano Luciani · Ferrara, IT
• Wolfgang Neissl · Lichtenberg, AT
• Norbert Hafner · Linz, AT

Key dates

• Filing date: Feb 13, 1998
• Grant date: Aug 1, 2000
• Expiry date: Feb 13, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Procedure for the preparation of a solid carrier for olefin polymerization catalysts, comprising the steps: PA1 a) impregnating a silica with a solution of Mg-chloride in the presence of electron donors, PA1 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, PA1 c) subsequently treating the slurry obtained in (b) at a temperature from 40.degree. C. to reflux temperature, PA1 d) drying the carrier obtained in (c).