Lactic acid extraction and purification process
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United States of America Patent
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Jun 24, 1997
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N/A
app pub date -
Oct 10, 1995
filing date -
Feb 18, 1993
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Abstract
The subject of the invention is a process for extracting pure lactic acid from fermentation liquors by ion exchange chromatography on a strongly acidic cation exchanger, preferably in H.sup.+ form. In a first step, the NH.sub.4 lactate coming from the fermentation is converted into the free acid by genuine ion exchange. This conversion is preferably effected on a weakly acidic cation exchanger in H.sup.+ form.
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