Method for the processing of a liquid reaction discharge of the cationic polymerization of isobutene

US7038008B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Wettling · Schifferstadt, DE
• Dirk Borchers · Birkenheide, DE
• Heinz Auer · Neulußheim, DE

Key dates

• Filing date: Apr 10, 2002
• Grant date: May 2, 2006
• Expiry date: Apr 10, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/003
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for working up a liquid reaction discharge of the cationic polymerization of isobutene, which substantially comprises polyisobutene, unconverted isobutene and an inert diluent, in which the reaction discharge is heated and is let down into a flash container, is described, the reaction discharge separating, as a result of the flashing, into a polyisobutene-containing liquid phase and a gas phase containing the main amount of the isobutene contained in the reaction discharge and of the diluent.