Processing

Please wait...

Settings

Settings

Goto Application

1. WO2000015597 - METHOD FOR CRYSTALLISING CARBOXYLIC ACID

Publication Number WO/2000/015597
Publication Date 23.03.2000
International Application No. PCT/FR1999/002181
International Filing Date 14.09.1999
Chapter 2 Demand Filed 04.04.2000
IPC
C07C 51/42 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
42Separation; Purification; Stabilisation; Use of additives
C07C 51/43 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
42Separation; Purification; Stabilisation; Use of additives
43by change of the physical state, e.g. crystallisation
CPC
C07C 51/42
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
42Separation; Purification; Stabilisation; Use of additives
C07C 51/43
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
42Separation; Purification; Stabilisation; Use of additives
43by change of the physical state, e.g. crystallisation
Applicants
  • RHODIA POLYAMIDE INTERMEDIATES [FR]/[FR] (AllExceptUS)
  • COSTANTINI, Michel [FR]/[FR] (UsOnly)
  • FACHE, Eric [FR]/[FR] (UsOnly)
Inventors
  • COSTANTINI, Michel
  • FACHE, Eric
Agents
  • ESSON, Jean-Pierre
Priority Data
98/1159014.09.1998FR
99/0859029.06.1999FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR CRYSTALLISING CARBOXYLIC ACID
(FR) PROCEDE DE CRISTALLISATION D'ACIDE CARBOXYLIQUE
Abstract
(EN)
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.
(FR)
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.
Latest bibliographic data on file with the International Bureau