Title:
A PROCESS FOR THE RECOVERY OF CITRIC ACID
Document Type and Number:
WIPO Patent Application WO2004087631
Kind Code:
A3
Abstract:
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.
Inventors:
BANIEL AVRAHAM (IL)
VITNER ASHER (IL)
GONEN DAVID (IL)
HEIDEL DAVID (US)
VITNER ASHER (IL)
GONEN DAVID (IL)
HEIDEL DAVID (US)
Application Number:
PCT/IL2004/000203
Publication Date:
December 02, 2004
Filing Date:
March 03, 2004
Export Citation:
Assignee:
STALEY MFG CO A E (US)
BANIEL AVRAHAM (IL)
VITNER ASHER (IL)
GONEN DAVID (IL)
HEIDEL DAVID (US)
BANIEL AVRAHAM (IL)
VITNER ASHER (IL)
GONEN DAVID (IL)
HEIDEL DAVID (US)
International Classes:
C07C51/43; C07C51/48; (IPC1-7): C07C51/43; C07C51/48; C07C59/265
Foreign References:
| EP0432610A2 | 1991-06-19 | |||
| US5426220A | 1995-06-20 |
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