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. 28, 2017
Filed:
Aug. 27, 2014
Applicants:
Steffen Krill, Muehltal, DE;
Matthias Groemping, Darmstadt, DE;
Alexander Lygin, Griesheim, DE;
Torsten Balduf, Pfungstadt, DE;
Rudolf Burghardt, Darmstadt, DE;
Inventors:
Steffen Krill, Muehltal, DE;
Matthias Groemping, Darmstadt, DE;
Alexander Lygin, Griesheim, DE;
Torsten Balduf, Pfungstadt, DE;
Rudolf Burghardt, Darmstadt, DE;
Assignee:
EVONIK ROEHM GmbH, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 45/75 (2006.01); C07C 45/80 (2006.01); C07C 45/82 (2006.01); C07C 67/54 (2006.01); C07C 67/39 (2006.01); C07C 45/84 (2006.01);
U.S. Cl.
CPC ...
C07C 45/75 (2013.01); C07C 45/80 (2013.01); C07C 45/82 (2013.01); C07C 45/84 (2013.01); C07C 67/39 (2013.01); C07C 67/54 (2013.01);
Abstract
The present invention relates to a process for preparing methyl methacrylate by direct oxidative esterification of methacrolein and the preparation of methacrolein. It is a feature of this novel process that it was possible to distinctly increase the yield and the efficiency of the process compared to the prior art through a sequence of different distillation steps.