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. 27, 2020
Filed:
Apr. 03, 2018
Applicant:
Arkema France, Colombes, FR;
Inventors:
Michel Jean Fauconet, Valmont, FR;
Serge Tretjak, Roulhing, FR;
Assignee:
Arkema France, Colombes, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/44 (2006.01); B01D 3/14 (2006.01); B01D 3/34 (2006.01); B01D 9/00 (2006.01); C07C 51/215 (2006.01); C07C 51/25 (2006.01); C07C 51/21 (2006.01);
U.S. Cl.
CPC ...
C07C 51/44 (2013.01); B01D 3/141 (2013.01); B01D 3/34 (2013.01); B01D 9/004 (2013.01); C07C 51/21 (2013.01); C07C 51/215 (2013.01); C07C 51/252 (2013.01);
Abstract
The invention relates to the use of a column with a separating wall as a purification/finishing column in a (meth)acrylic acid recovery method based on the use of two distillation columns in the absence of external organic solvent. The method according to the invention improves the energy balance for the method while improving the technical quality of the (meth)acrylic acid recovered. The method according to the invention further produces polymer-grade (or glacial) (meth)acrylic acid compatible with the production of high-molecular weight acrylic acid polymers.