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:
Sep. 24, 2024
Filed:
Mar. 20, 2020
Arkema France, Colombes, FR;
Serge Tretjak, Saint Avold cedex, FR;
Veronique Scharff, Colombes cedex, FR;
Aurelien Huve, Saint Avold cedex, FR;
Arkema France, Colombes, FR;
Abstract
The invention relates to the purification of an acrylic acid comprising aldehyde compounds in a low content, according to a distillation process in a distillation unit in the absence of chemical reagent for treating the aldehydes, producing a stream of polymer-grade acrylic acid which is withdrawn through a side outlet of the distillation unit. The invention makes it possible to eliminate the use of a product classified as CMR in the manufacture of polymer-grade acrylic acid from a technical-grade acrylic acid, and thus meets the HSE requirements for industrial plants.