Method of preparing monopotassium L-malate and its monohydrate

Details Method of preparing monopotassium L-malate and its monohydrate Method of preparing monopotassium L-malate and its monohydrate

1978-02-10

1978-11-07

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5922

Patent

active

041246365

ABSTRACT:
An aqueous solution of L-malic acid and potassium ion is prepared having a pH of no more than 6.8. The aqueous solution is cooled to initiate crystallization of a potassium salt of L-malic acid, and the aqueous mixture obtained is allowed to stand at a pH of 5.3 to 6.8 until it substantially reaches liquid-solid equilibrium. The resultant crystals of monopotassium L-malate monohydrate are collected therefrom. The monopotassium L-malate monohydrate thus obtained may be dried to give the corresponding anhydrate. Monopotassium L-malate and its monohydrate are stable, non-hygroscopic crystals.

REFERENCES:
patent: 3435070 (1969-03-01), Cheng
patent: 4057577 (1977-11-01), Suzuki

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