Process for producing 2-hydroxy-4-methylthiobutyric acid
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United States of America Patent
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Dec 16, 2008
Grant Date -
Sep 13, 2007
app pub date -
Aug 12, 2005
filing date -
Aug 18, 2004
priority date (Note) -
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Abstract
The present invention provides a process for producing 2-hydroxy-4-methylthiobutyric acid comprising the following steps (1) to (4): (1): hydrolyzing 2-hydroxy-4-methylthiobutyronitrile in the presence of sulfuric acid, (2): separating the reaction mixture obtained in the step (1) into an oil layer containing 2-hydroxy-4-methylthiobutyric acid and a water layer, (3): concentrating the oil layer obtained in the step (2), and (4) heating the concentrated product obtained in the step (3).
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