Method for purifying L-phenylalanine

Details Method for purifying L-phenylalanine Method for purifying L-phenylalanine

1993-02-17

1994-05-17

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

C07C22928

Patent

active

053129776

ABSTRACT:
L-Phenylalanine is isolated in pure form from an aqueous solution thereof containing cinnamic acid by subjecting the aqueous solution to toluene extraction to extract cinnamic acid therefrom; separating the toluene phase; and then concentrating the aqueous phase, until crystals of L-phenylalanine form therein, while concurrently separating the crystalline L-phenylalanine from the liquid aqueous phase.

REFERENCES:
patent: 4173469 (1988-03-01), Evans et al.
Database WPIL, Week 8410, AN 84-058415 & JP-A-59 014 796 Jan. 25, 1984.
Patent Abstracts of Japan, vol. 11, No. 96 (C-412) (2543) Mar. 26, 1987.
Patent Abstracts of Japan, vol. 9, No. 211 (C-300)(1934) Aug. 29, 1985.
Database WPIL, Week 8641, AN 86-267881 & JP-A-61 194 056 Feb. 21, 1985.

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