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US 7,465,827 B2Granted
Process for producing 2-hydroxy-4-methylthiobutyric acid
AssigneeSumitomo Chemical Company, Limited
InventorsToru Haga, Tetsuya Shiozaki
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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).
Claims3
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) without distilling a volatile component from the concentrated product.
5 more elements
Dependencies are inferred from the claim text.