Process for recovering L-phenylalanine

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

1995-03-24

1996-06-25

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

562443, 562445, C07C22934

Patent

active

055301550

ABSTRACT:
Addition of a reaction mixture obtained by the mineral acid hydrolysis of at least one side flow generated from the production of .alpha.-L-aspartyl-L-phenylalanine methyl ester to a crystallization slurry containing L-phenylalanine while maintaining the pH of the slurry at 3-8 by adding aqueous alkali affords crystallized L-phenylalanine having a low water content in a high yield.

REFERENCES:
patent: 4803300 (1989-02-01), Hijiya et al.
patent: 5118840 (1992-06-01), Kano et al.
patent: 5304671 (1994-04-01), Abe et al.
Chemical Abstracts, vol. 109, No. 23, p. 710, Dec. 5, 1988, AN 211485u, JP-A-63 159 355, R. Mita, et al., "Recovery of L-Phenylalanine and L-Aspartic Acid from a Process for Aspartame Manufacture".

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