Arkema France

Myriam Gerbier

Jean-Michel Bossoutrot

Jean-François Devaux

Jose Luis Orozco

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).

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Pierre-Benite, France

Myriam Gerbier