Process for recovering L-phenylalanine

Details Process for recovering L-phenylalanine Process for recovering L-phenylalanine

1994-10-27

1996-07-02

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

C07C21100

Patent

active

055324070

ABSTRACT:
An industrial process for recovering L-phenylalanine in high yield from a side stream obtained from .alpha.-APM is disclosed. L-aspartic acid or an aqueous solution thereof is added to such a side stream when hydrolysis of the side stream is performed under acidic conditions with a mineral acid, the pH of the reaction mixture obtained by hydrolysis is then adjusted to 5 to 6 to precipitate L-phenylalanine.

REFERENCES:
patent: 4822907 (1989-04-01), Sugiyama
patent: 5015386 (1991-05-01), Tanabe
patent: 5096590 (1992-03-01), Watanabe
Database WPI, Derwent Publications, AN-74-18275V, JP-48-097812, Dec. 13, 1973.
Database WPI, Derwent Publications, AN-88-224248, JP-63-159355, Jul. 2, 1988.

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