Process for producing 2-hydroxy-4-methylthiobutanoic acid
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United States of America Patent
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Jan 31, 1995
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N/A
app pub date -
Jan 12, 1994
filing date -
May 21, 1992
priority date (Note) -
Expired
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Abstract
Methyl 2-hydroxy-4-methylthiobutanoate and formamide are produced by means of reacting 2-hydroxy-4-methylthiobutanamide obtained by hydration of 2-hydroxy-4-methylthiobutyronitrile with methyl formate. Said methyl 2-hydroxy-4-methylthiobutanoate is hydrolyzed to give 2-hydroxy-4-methylthiobutanoic acid and methanol. No sulfuric acid is employed as a reacting agent, hence exhaustion of a large quantity of ammonium sulfate is prevented. Formamide and methanol thus produced can be recycled as reactants.
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