Citric acid extraction

Details Citric acid extraction Citric acid extraction

1994-07-07

1995-06-20

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5142, C07C 5148

Patent

active

054262208

ABSTRACT:
In the production of citric acid aqueous mother liquor originating from a lime/sulfuric acid process is subjected to a multi-stage counter-current extraction with an amine based organic extractant. A solution of a further amount of citric acid derived from direct extraction of a citric acid fermentation broth is judicously injected into the organic phase stream in the counter-current extraction and a combined extract is withdrawn from the operation. This extract can be subjected to any known treatment for the recovery of citric acid values.

REFERENCES:
patent: 3944606 (1976-03-01), Rieger et al.
patent: 4275234 (1981-06-01), Baniel et al.
patent: 4334095 (1982-06-01), Baniel
patent: 4720577 (1988-01-01), Wojtech et al.
patent: 4994609 (1991-02-01), Baniel et al.
patent: 5231225 (1993-07-01), Baniel et al.

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