Patent · US Expired

Method for producing supported chrome catalysts and the use thereof for the polymerization of olefins

US6608151B1 · kind B1 · utility

2Cited by

11References

9Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Paulus De Lange · Wesseling, DE
Guido Funk · Worms, DE
Andreas Deckers · Flomborn, DE
Peter Kölle · Bad Dürkheim, DE

Key dates

Filing date	Feb 28, 2002
Grant date	Aug 19, 2003
Priority date	—
Expiry date	Feb 28, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F210/16
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a method for producing supported chromium catalysts for the polymerisation of olefins by loading a xerogel support with chromium by adding to the xerogel support a volume of a 0.025 to 15% by weight solution of a chromium compound or a volume of a solution comprising from 0.025 to 7.8% by weight of Cr which is essentially converted into a chromium(VI) compound on heating in a water-free stream of gas under oxidizing conditions at temperatures in the range from 300 to 1100° C. for a period of from 10 to 1000 minutes in a solvent which comprises a maximum of 20% by weight of water, and subsequently evaporating the solvent, where the volume of the chromium salt solution employed is smaller than the pore volume of the xerogel support.

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