Process for the production of 2-hydroxy-4-methythiobutyric...

Details Process for the production of 2-hydroxy-4-methythiobutyric... Process for the production of 2-hydroxy-4-methythiobutyric...

2004-03-26

2009-02-03

Saeed, Kamal A (Department: 1626)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07485748

ABSTRACT:
A process for preparing 2-hydroxy-4-methylthiobutyric acid ammonium salt involves reacting 3-methylthiopropionaldehyde with hydrogen cyanide to form 2-hydroxy-4-methylthiobutyronitrile, and subsequently hydrolyzing the 2-hydroxy-4-methylthiobutyronitrile by catalytic hydrolysis to form the ammonium salt of the 2-hydroxy-4-methylthiobutyric acid in a single process step. One catalyst may be used in the hydrolysis for the whole reaction. The catalyst is preferably a solid containing a titanium compound such as, e.g., titanium nitride, titanium sulfide or titanium dioxide. The 2-hydroxy-4-methylthiobutyric acid ammonium salt produced by this process is nutritional and can be used as an additive in feedstuffs.

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