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1. WO2004087631 - A PROCESS FOR THE RECOVERY OF CITRIC ACID

Publication Number WO/2004/087631
Publication Date 14.10.2004
International Application No. PCT/IL2004/000203
International Filing Date 03.03.2004
IPC
C07C 51/43 2006.1
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
C07C 51/48 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
42Separation; Purification; Stabilisation; Use of additives
48by liquid-liquid treatment
CPC
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
C07C 51/48
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
42Separation; Purification; Stabilisation; Use of additives
48by liquid-liquid treatment
Applicants
  • A.E. STALEY MANUFACTURING COMPANY [US]/[US] (AllExceptUS)
  • BANIEL, Avraham [IL]/[IL] (UsOnly)
  • VITNER, Asher [IL]/[IL] (UsOnly)
  • GONEN, David [IL]/[IL] (UsOnly)
  • HEIDEL, David [US]/[US] (UsOnly)
Inventors
  • BANIEL, Avraham
  • VITNER, Asher
  • GONEN, David
  • HEIDEL, David
Agents
  • WOLFF, BREGMAN AND GOLLER
Priority Data
15516131.03.2003IL
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A PROCESS FOR THE RECOVERY OF CITRIC ACID
(FR) PROCEDE DE RECUPERATION D'ACIDE CITRIQUE
Abstract
(EN) The invention provides a process for the recovery of citric acid from an aqueous solution feed stream originating in fermentation of carbohydrates and utilizing an amine solvent extraction step for separation of impurities comprising: subjecting said aqueous solution feed stream A to a treatment for partial recovery of citric acid, wherein said treatment is other than amine solvent extraction, to form a first portion of purified citric acid B and a secondary feed stream F; subjecting at least a portion G of said secondary feed stream F to a treatment consisting of amine solvent extraction to form a second portion of purified citric acid solution and to reject substantial of impurities initially present in said portion of said secondary feed stream; subjecting said second portion of purified citric acid solution to crystallization; and recycling mother liquor from said crystallization.
(FR) L'invention concerne un procédé destiné à récupérer de l'acide citrique à partir d'un flux d'alimentation en solution aqueuse résultant de la fermentation de glucides, et faisant appel à une opération d'extraction de solvant aminique pour la séparation d'impuretés. Ce procédé consiste à soumettre le flux d'alimentation en solution aqueuse (A) à un traitement destiné à la récupération partielle de l'acide citrique, ledit traitement n'étant pas une extraction de solvant aminique, de manière à former une première partie d'acide citrique purifié (B) et un flux d'alimentation secondaire (F), à soumettre au moins une partie (G) du flux d'alimentation secondaire (F) à un traitement comprenant une extraction de solvant aminique de façon à former une seconde partie de solution d'acide citrique purifiée et à rejeter sensiblement les impuretés initialement présentes dans cette partie du flux d'alimentation secondaire, à soumettre ladite seconde partie de solution d'acide citrique purifiée à une cristallisation, et à recycler la liqueur mère résultant de cette cristallisation.
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