Method for producing polyetherpolyols in the presence of a multi-metal cyanide complex catalyst

US6673972B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Ostrowski · Mannheim, DE
• Kathrin Harre · Dresden, DE
• Peter Zehner · Ludwigshafen, DE
• Jörn Müller · Sickte, DE
• Dieter Stützer · Marloffstein, DE
• Georg Heinrich Grosch · Bad Dürkheim, DE
• Jurgen Winkler · Schwarzheide, DE
• Stephan Bauer · Ostercappeln, DE

Key dates

• Filing date: Jul 5, 2002
• Grant date: Jan 6, 2004
• Expiry date: Jul 5, 2022

Classification

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

Abstract

Polyetherpolyols are prepared 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 by a process which is carried out in a vertical upright cylindrical reactor comprising a jet nozzle which is arranged in the upper reactor region and is directed downward and via which the starting materials and the reaction mixture are fed in, and comprising a take-off, preferably in the lower reactor region, via which the reaction mixture is fed back to the jet nozzle in an external circulation by means of a pump via an equilibration container, comprising a concentric guide tube which extends over the total length of the reactor, except for the reactor ends, and comprising a heat exchanger integrated in the annular space.