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. 30, 2025
Filed:
Jun. 16, 2021
Arkema France, Colombes, FR;
Jean-François Devaux, Pierre-Benite, FR;
Myriam Gerbier, Pierre-Benite, FR;
Jean-Michel Bossoutrot, Pierre-Benite, FR;
Jose Luis Orozco, Pierre-Benite, FR;
ARKEMA FRANCE, Puteaux, FR;
Abstract
Process for producing aminocarboxylic acid of formula (I): NH—CH—(CH)—COOH (I) including: (i) reacting the unsaturated carboxylic acid of formula (II): CH═CH—(CH)—COOH (II) with hydrogen bromide to form the ω-bromoalkanoic acid of formula (iii): Br—CH—(CH)—COOH (III); (ii) reacting the ω-bromoalkanoic acid obtained with ammonia in aqueous solution to form a reaction mixture; (iii) separating the reaction mixture of the aminocarboxylic acid of formula (I) and an aqueous solution rich in ammonium bromide; (iv) bringing the aqueous solution rich in ammonium bromide into contact with sodium hydroxide to form ammonia and an aqueous solution rich in sodium bromide; (v) purifying the aqueous solution rich in sodium bromide; (vi) bringing the purified aqueous solution rich in sodium bromide into contact with chlorine to form bromine and an aqueous solution rich in sodium chloride; (vii) reacting the bromine with hydrogen to form hydrogen bromide; and (viii) recycling the hydrogen bromide to step (i).