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:
Aug. 22, 2023
Filed:
Sep. 10, 2020
Applicant:
Röhm Gmbh, Darmstadt, DE;
Inventors:
Assignee:
Röhm GmbH, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/54 (2006.01); C07C 67/44 (2006.01); C07C 67/60 (2006.01); C07C 67/62 (2006.01); C07C 45/75 (2006.01); B01D 3/14 (2006.01);
U.S. Cl.
CPC ...
C07C 67/54 (2013.01); B01D 3/14 (2013.01); C07C 45/75 (2013.01); C07C 67/44 (2013.01); C07C 67/60 (2013.01); C07C 67/62 (2013.01);
Abstract
A novel process can be used for purifying methyl methacrylate (MMA) contaminated with low-boiling components by distillation, where the process involves producing MMA by oxidative esterification, and a crude product containing methyl propionate (MP), methyl isobutyrate (MIB), and methacrolein (MAL) as low-boiling components. The process is compatible with MMA produced from C-based methacrolein containing the low-boiling components specified.