Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1998-10-02
2000-12-26
Richter, Johann
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562580, C07C 5142, C07C38100
Patent
active
06166250&
ABSTRACT:
A continuous process for the preparation of 2-hydroxy-4-methylthiobutanoic acid which includes introducing sulfuric acid into a first reactor including a continuous stirred tank reactor and introducing 2-hydroxy-4-methylthiobutanenitrile into the first reactor. 2-hydroxy-4-methylthiobutanenitrile is continually hydrolyzed within the first reactor to produce an intermediate aqueous hydrolysis solution containing 2-hydroxy-4-methylthiobutanamide. The intermediate aqueous hydrolysis solution is continuously introduced into a plug flow reactor. 2-hydroxy-4-methylthiobutanamide is continually hydrolyzed within the plug flow reactor to produce an aqueous hydrolyzate product solution containing 2-hydroxy-4-methylthiobutanoic acid. 2-hydroxy-4-methylthiobutanoic acid is recovered from the aqueous hydrolyzate product solution.
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Blackburn Thomas F.
Hsu Yung C.
Kranz Allen H.
Pellegrin Paul F.
Willock James M.
Key Rosalynd
Novus International, Inc.
Richter Johann
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