Method of producing polyetherpolyols

US6664428B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Ostrowski · Mannheim, DE
• Kathrin Harre · Dresden, DE
• Georg Heinrich Grosch · Bad Dürkheim, DE
• Gerd Hoppner · Schwarzheide, DE
• Peter de Vocht · Ranst, BE
• Dirk Leys · Grobbendonk, BE
• Jurgen Winkler · Schwarzheide, DE
• Stephan Bauer · Ostercappeln, DE

Key dates

• Filing date: Aug 20, 2002
• Grant date: Dec 16, 2003
• Expiry date: Aug 20, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst is proposed, the reaction being carried out in a stirred kettle reactor and the reaction mixture being circulated via an external heat exchanger by means of a pump.