【発明の名称】飼料添加剤 - Nubus International, Inc.

Title:

【発明の名称】飼料添加剤

Document Type and Number:

Japanese Patent JPH0797970

Kind Code:

B2

Abstract:

A process for the preparation of 2-hydroxy-4-methylthiobutyric acid having improved color, odor and lower viscosity. 2-hydroxy-4-methylthiobutyronitrile is hydrolyzed with sulfuric acid having an initial strength of between about 50% by weight and about 70% by weight on an organic-free basis, thereby producing an intermediate aqueous hydrolysis product solution containing 2-hydroxy-4-methylthiobutyramide. The 2-hydroxy-4-methylthiobuty- ramide is hydrolyzed with sulfuric acid having a strength of between about 30% by weight and about 50% by weight on an organic-free basis to produce an aqueous hydrolyzate containing 2-hydroxy-4-methylthiobutyric acid. The hydrolyzate solution is contacted with a substantially water-immiscible organic solvent in a liquid-liquid extraction system to produce an extract comprising the solvent and 2-hydroxy-4-methylthiobutyric acid transferred from the hydrolyzate. The acid product is then recovered from the extract.

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Inventors:

Dennis Arthur Roast
Masaharu Takano
Lawrence Rutsel Wolf

Application Number:

JP19986592A

Publication Date:

October 25, 1995

Filing Date:

July 27, 1992

Export Citation:

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Assignee:

Nubus International, Inc.

International Classes:

A01N37/02; A23K50/15; C07C67/00; A23K1/16; C07C319/20; C07C323/52; C07C325/00; C07C327/06; C12P11/00; C07C; (IPC1-7): A23K1/16

Other References:

ANIM.FEED SCI.TECHNOL.=1977

Attorney, Agent or Firm:

Akira Asamura (2 outside)

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