The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2019
Filed:
Jun. 30, 2015
Covestro Deutschland Ag, Leverkusen, DE;
Stefanie Braun, Köln, DE;
Horst Zwick, Dormagen, DE;
Matthias Wohak, Dormagen, DE;
Jörg Hofmann, Krefeld, DE;
Aurel Wolf, Wülfrath, DE;
Michael Traving, Burscheid, DE;
Rolf Bachmann, Bergisch Gladbach, DE;
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
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 () and a tubular reactor () connected as a post reactor downstream thereof, wherein the method is characterized in that at the outlet () of the tubular reactor () a temperature is set that is at least 10° C. above the temperature in the inside of the main reactor (). The invention further relates to a device for carrying out said method.