Patent · US Expired

Method for polymerizing &agr;-olefins in a gaseous phase

US6469111B1 · kind B1 · utility

3Cited by

8References

9Claims

0Family size

Assignee

BASF SE

Inventors

Shahram Mihan · Bad Soden, DE
Arim Lange · Heidelberg, DE
Philipp Rosendorfer · Neustadt, DE
Johannes Hack · Bad Kötzting, DE

Key dates

Filing date	Oct 13, 1999
Grant date	Oct 22, 2002
Priority date	—
Expiry date	Oct 13, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F10/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

&agr;-Olefins are polymerized in the gas phase at from 30 to 150° C. and a pressure of from 5 to 80 bar using a catalyst or a catalyst mixture containing as antistatic agent from 0.1 to 5% by weight of ZnO and/or anhydrous MgO, based on the total amount of the catalyst mixture, except for a process in which the catalyst mixture comprises a chromium catalyst and MgO-supported Ziegler catalyst which is modified with an alkene and with alkylaluminum hydride and also comprises free MgO and the total amount of the MgO is not less than 2% by weight of the catalyst mixture.

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