Method for producing polyether alcohols

US7723465B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Stephan Herwig · Haßloch, DE
• Thomas Ostrowski · Mannheim, DE
• Dirk Meckelnburg · Schifferstadt, DE
• Achim Loeffler · Puming, CN
• Renata Jovanovic · Ludwigshafen, DE
• Werner Weinle · Friedelsheim, DE

Key dates

• Filing date: Jul 11, 2006
• Grant date: May 25, 2010
• Expiry date: Dec 1, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2696
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a process for continuously preparing polyether alcohols using DMC catalysts, which comprises, in a first step, in a continuous reactor, adding alkylene oxides onto H-functional starter substances and transferring the output of this reactor to a second step in a reactor which is divided by closed trays into mutually separate sections, known as compartments, which are connected to one another by external pipelines, in which the output of the reactor from the first step of the reaction passes through the compartments in succession.