METHOD FOR PRODUCING D-LACTIC ACID, AND METHOD FOR INCREASING OPTICAL PURITY OF D-LACTIC ACID OR YIELD OF D-LACTIC ACID RELATIVE TO SUGAR IN LACTIC ACID
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United States of America Patent
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Issued Date -
Dec 29, 2011
app pub date -
Jan 22, 2010
filing date -
Jan 23, 2009
priority date (Note) -
Abandoned
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Abstract
Disclosed is a method for producing D-lactic acid by allowing a microorganism to utilize a purified treacle and culturing the microorganism. Also disclosed is a method for increasing the optical purity of D-lactic acid in lactic acid. Specifically disclosed is a method for producing D-lactic acid by allowing a microorganism to utilize a treacle and culturing the microorganism, which involves a step of purifying the treacle by means of an ion exchange technique. The method enables the efficient production of lactic acid which contains D-lactic acid having an optical purity of 99.40% e.e. or more.
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