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. 18, 2014
Filed:
Nov. 17, 2011
Matthias Orschel, Muenster, DE;
Robert Jansen, Bottrop, DE;
Martin Maier, Herne, DE;
Gerda Grund, Coesfeld, DE;
Markus Schwarz, Haltern am See, DE;
Joerg-joachim Nitz, Oberhausen, DE;
Axel Hengstermann, Senden, DE;
Matthias Orschel, Muenster, DE;
Robert Jansen, Bottrop, DE;
Martin Maier, Herne, DE;
Gerda Grund, Coesfeld, DE;
Markus Schwarz, Haltern am See, DE;
Joerg-Joachim Nitz, Oberhausen, DE;
Axel Hengstermann, Senden, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
The invention relates to a method for producing isophorone by catalyzed aldol condensation of acetone as an educt, reprocessing the reaction product, hydrolyzing the product stream, and separating into an organic and an aqueous fraction, obtaining isophorone from the organic fraction, distillatively reprocessing the aqueous fraction, and feeding the vapors from the head of the distillative reprocessing apparatus into the hydrolysis apparatus.