Process for the recovery of lactic acid

Details Process for the recovery of lactic acid Process for the recovery of lactic acid

1998-06-24

1999-09-28

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

562589, C07C 5142

Patent

active

059591447

ABSTRACT:
The invention provides a process for the recovery of lactic acid from an aqueous liquor containing water and calcium lactate, comprising the extraction step of combining the lactate aqueous liquor with an extractant containing at least one water immiscible amine having a total of at least 18 carbon atoms in the presence of carbon dioxide to form an aqueous phase and an organic phase containing extracted lactic acid and the extractant and separating lactic acid from the organic phase, characterized in that a carbohydrate is added to the aqueous liquor, the carbohydrate being present in the aqueous liquor at a weight concentration of at least 10% of the water content thereof.

REFERENCES:
patent: 5136057 (1992-08-01), Bhatia
patent: 5510526 (1996-04-01), Baniel et al.
patent: 5773653 (1998-06-01), Baniel
patent: 5780276 (1998-07-01), Baniel
patent: 5780678 (1998-07-01), Baniel et al.
patent: 5831122 (1998-11-01), Eyal

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