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1. (WO2004087631) A PROCESS FOR THE RECOVERY OF CITRIC ACID
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2004/087631 International Application No.: PCT/IL2004/000203
Publication Date: 14.10.2004 International Filing Date: 03.03.2004
IPC:
C07C 51/43 (2006.01) ,C07C 51/48 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
51
Preparation of carboxylic acids or their salts, halides, or anhydrides
42
Separation; Purification; Stabilisation; Use of additives
43
by change of the physical state, e.g. crystallisation
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
51
Preparation of carboxylic acids or their salts, halides, or anhydrides
42
Separation; Purification; Stabilisation; Use of additives
48
by liquid-liquid treatment
Applicants:
A.E. STALEY MANUFACTURING COMPANY [US/US]; 2200 East Eldorado Street Decatur, IL 62521, US (AllExceptUS)
BANIEL, Avraham [IL/IL]; IL (UsOnly)
VITNER, Asher [IL/IL]; IL (UsOnly)
GONEN, David [IL/IL]; IL (UsOnly)
HEIDEL, David [US/US]; US (UsOnly)
Inventors:
BANIEL, Avraham; IL
VITNER, Asher; IL
GONEN, David; IL
HEIDEL, David; US
Agent:
WOLFF, BREGMAN AND GOLLER; P.O. Box 1352 91013 Jerusalem, IL
Priority Data:
15516131.03.2003IL
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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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
BRPI0409540EP1608613US20060247468US20080161601