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:
Oct. 29, 2019
Filed:
Oct. 16, 2018
Evonik Roehm Gmbh, Darmstadt, DE;
Steffen Krill, Muehltal, DE;
Torsten Balduf, Pfungstadt, DE;
Martin Koestner, Darmstadt, DE;
Matthias Groemping, Darmstadt, DE;
Alexander Lygin, Griesheim, DE;
Rudolf Burghardt, Darmstadt, DE;
EVONIK ROEHM GmbH, Darmstadt, DE;
Abstract
The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.