Patent · US Expired

Carrier for olefin polymerization catalysts

US6103655A · kind A · utility

2Cited by

22References

15Claims

0Family size

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 15, 2000
Priority date	—
Expiry date	Feb 13, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F110/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Procedure for the preparation of a solid carrier for olefin polymerization catalysts, comprising the steps: PA1 a) impregnating a silica with Mg-chloride solubilized in ethylbenzoate, in the presence of further electron donors, PA1 b) optionally 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. and subsequently treating the obtained slurry at a temperature from 40.degree. C. to reflux temperature, optionally adding a further amount of electron donors, PA1 c) drying the obtained carrier. The carrier which is obtained according to the above procedure is advantageously used for the preparation of supported catalysts for the polymerization of olefins.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.