Process for producing 2-hydroxy-4-methylthiobutyric acid

Details Process for producing 2-hydroxy-4-methylthiobutyric acid Process for producing 2-hydroxy-4-methylthiobutyric acid

2005-08-12

2008-12-16

Zucker, Paul A (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07465827

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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