C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/42 (2006.01) C07C 51/43 (2006.01) C07C 55/14 (2006.01)
Patent
CA 2343012
The invention concerns a method for crystallising carboxylic acid, more particularly adipic acid and a method for making crystallised carboxylic acid, more specifically a method for treating a reaction medium derived from direct oxidation of a hydrocarbon into carboxylic acid such as adipic acid, for example. More specifically, the invention concerns the crystallisation of adipic acid in an organic solvent for eliminating organic impurities contained in said acid and thereby ultimately facilitating its purification by crystallisation in water.
La présente invention concerne un procédé de cristallisation d'acide carboxylique, plus particulièrement d'acide adipique et un procédé de fabrication d'acide carboxylique cristallisé, plus spécifiquement un procédé de traitement du milieu réactionnel issu de l'oxydation directe d'un hydrocarbure en acide carboxylique comme l'acide adipique, par exemple. Elle concerne plus spécifiquement la cristallisation d'acide adipique dans un solvant organique permettant d'éliminer les impuretés organiques contenues dans ledit acide et ainsi éventuellement faciliter sa purification par une cristallisation dans l'eau.
Costantini Michel
Fache Eric
Rhodia Polyamide Intermediates
Robic
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