Method for producing highly reactive, low halogen polyisobutenes

US7365152B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hans Peter Rath · Havelsee, DE
• Thomas Perner · Eßlingen, DE
• Eckard Schauss · Heuchelheim, DE

Key dates

• Filing date: Dec 29, 2004
• Grant date: Apr 29, 2008
• Expiry date: Dec 29, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process is described for preparing polyisobutene having a low halogen content, in which isobutene is polymerized in the presence of a catalyst which comprises a halogenated Lewis acid, the catalyst is removed and/or deactivated, and the resulting polyisobutene is contacted with a zeolite of an average pore size of from 5 to 15 Å.