Preparation of malic acid

Details Preparation of malic acid Preparation of malic acid

1991-05-24

1993-05-11

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 59245

Patent

active

052102955

ABSTRACT:
There is disclosed a process for the hydration of an acid selected from the group consisting of maleic acid, fumaric acid, sodium hydrogen maleate and mixtures thereof to malic acid in an aqueous reaction mixture in excellent yields and with particularly high purity by performing the synthesis in the presence of sodium ions in the molar ratio of sodium ions to acid or salt thereof in the range of from 0.2 to about 0.5.

REFERENCES:
patent: 1491465 (1924-04-01), Craver
patent: 2972566 (1961-02-01), Kitahara et al.
patent: 3379756 (1968-04-01), Ahlyren
patent: 3435070 (1969-03-01), Cheng et al.
"New Catalyst for Hydration of Maleic Acid" N. A. Bzhasso et al. Zhur. Prick/Khimii vol. 42, No. 7 pp. 1610-1614, Jul., 1969.

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