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:
Nov. 27, 2018
Filed:
Apr. 13, 2017
Applicant:
Evonik Degussa Gmbh, Essen, DE;
Inventors:
Matthias Bahlmann, Heiden, DE;
Olivier Zehnacker, Dortmund, DE;
Markus Lütkehaus, Steinfurt, DE;
Benjamin Willy, Düsseldorf, DE;
Werner Escher, Neuss, DE;
Xinming Wang, Kanagawa-ken, JP;
Rolf Schneider, Gründau-Rothenbergen, DE;
Christoph Hiller, Dülmen, DE;
Stefan Münzner, Dorsten, DE;
Assignee:
Evonik Degussa GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 233/58 (2006.01); C07F 9/141 (2006.01); B01D 1/14 (2006.01);
U.S. Cl.
CPC ...
C07D 233/58 (2013.01); B01D 1/14 (2013.01); C07F 9/141 (2013.01);
Abstract
The invention relates to a process for purifying an ionic liquid comprising dialkylimidazolium ions by means of stripping, wherein water vapor is used at a particular temperature. The process according to the invention is characterized in that the decomposition of the ionic liquid is minimized during the procedure of the process.