Method for the production of polyether carbonate polyols and device therefor

US10208162B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Stefanie Braun · Cologne, DE
• Horst Zwick · Dormagen, DE
• Matthias Wohak · Dormagen, DE
• Jörg Hofmann · Krefeld, DE
• Aurel Wolf · Wülfrath, DE
• Michael Traving · Burscheid, DE
• Rolf Bachmann · Busswil, CH

Key dates

• Filing date: Jun 30, 2015
• Grant date: Feb 19, 2019
• Expiry date: Nov 9, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for producing polyether carbonate polyols by addition of one or more alkylene oxides and carbon dioxide to one or more H-functional starter substances in the presence of at least one DMC catalyst, in which the reaction is conducted in a main reactor (8) and a tubular reactor (11, 17) connected as a post reactor downstream thereof, wherein the method is characterized in that at the outlet (13) of the tubular reactor (11, 17) a temperature is set that is at least 10° C. above the temperature in the inside of the main reactor (8). The invention further relates to a device for carrying out said method.