Process for the purification of isoleucine

Details Process for the purification of isoleucine Process for the purification of isoleucine

1980-08-29

1981-12-22

Breitenstein, G. T.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 9912

Patent

active

043072461

ABSTRACT:
From a mixture of isoleucine and leucine in a ratio by weight of at least 3:7, the isoleucine is precipitated in an anhydrous solvent, particularly methyl ethyl ketone, using concentrated sulphuric acid. The precipitate is separated and freed from sulphuric acid, for example by neutralisation with barium hydroxide after elimination of the solvent. Industrial production of marketable isoleucine from a mixture still containing leucine.

REFERENCES:
patent: 2471053 (1949-05-01), Almquist
patent: 3960942 (1976-06-01), Hirsbrunner
Weissberger, "Technique of Organic Chemistry," vol. III, 2nd Ed., pp. 549-552 (1956).

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