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. 22, 2024
Filed:
Apr. 23, 2020
Applicant:
Arkema France, Colombes, FR;
Inventors:
Serge Tretjak, Saint Avold, FR;
Camille Hilpert, Saint Avold, FR;
Assignee:
Arkema France, Colombes, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/54 (2006.01); C07C 67/03 (2006.01); C07C 67/08 (2006.01);
U.S. Cl.
CPC ...
C07C 67/03 (2013.01); C07C 67/08 (2013.01); C07C 67/54 (2013.01);
Abstract
The invention relates to the manufacture of alkyl acrylates by direct esterification of acrylic acid by the corresponding alcohol. In particular, the invention relates to the use of a topping column equipped with a side draw-off making it possible to draw off a stream rich in acid impurities, such as β-hydroxypropionic acid and β-acryloyloxypropionic acid, during the distillation of the crude reaction mixture, in order to produce an acrylic ester meeting purity standards which are compatible with its use to prepare acrylic polymers.