Patent · US Expired

Method for producing polyisobutenes

US6710140B2 · kind B2 · utility

10Cited by

6References

14Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Wettling · Schifferstadt, DE
Dirk Borchers · Birkenheide, DE
Wim Verrelst · Edegem, BE
Hans Peter Rath · Havelsee, DE

Key dates

Filing date	Feb 19, 2003
Grant date	Mar 23, 2004
Priority date	—
Expiry date	Feb 19, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F110/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of polyisobutylenes by cationic polymerization of isobutylene or isobutylene-containing hydrocarbon streams in the liquid phase in the presence of boron trifluoride acting as catalyst, the catalytic activity of boron trifluoride being partially or completely stopped by means of a solid deactivator following a given timelapse, which deactivator is an inorganic, anhydrous or hydrous oxygen compound of aluminum which is insoluble in the reaction mixture.

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