Purification process of lactic acid

Details Purification process of lactic acid Purification process of lactic acid

1997-12-08

2000-08-29

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

562589, C07C 5142, C07C 5908

Patent

active

061111376

ABSTRACT:
A process for treating pyruvic acid and other impurities of lactic acid by reduction treatment of an aqueous lactic acid solution and for obtaining high quality lactic acid having a substantially no pyruvic acid content, high purity, excellent heat stability and improved smell. Further, a high molecular weight polylactic acid having low coloration and consistent quality can be prepared by dehydration polycondensation of lactic acid obtained by the reduction treatment.

REFERENCES:
patent: 3716584 (1973-02-01), Chaintron
patent: 5310865 (1994-05-01), Enomoto et al.
patent: 5488156 (1996-01-01), Kulprathipanja

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