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. 02, 2021
Filed:
Jun. 26, 2019
Applicant:
Arkema France, Colombes, FR;
Inventor:
Pierre-Emmanuel Conoir, Saint Avold, FR;
Assignee:
Arkema France, Colombes, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/54 (2006.01); C07C 67/08 (2006.01); C07C 67/58 (2006.01); B01D 3/36 (2006.01); C07C 69/54 (2006.01);
U.S. Cl.
CPC ...
C07C 67/54 (2013.01); B01D 3/36 (2013.01); C07C 67/08 (2013.01); C07C 67/58 (2013.01); C07C 69/54 (2013.01);
Abstract
The present invention relates to the production of light (meth)acrylic esters by direct esterification of acrylic acid by methanol or ethanol. The invention more particularly relates to a process for the recovery/purification of C1-C2 alkyl acrylate comprising the azeotropic distillation of the crude reaction mixture using a distillation column comprising a sidestream drawing off of a fraction rich in alkyl alkoxypropionate byproduct, the boiling point of which is close to that of acrylic acid, and therefore problematic in the purification process.