Process for the preparation of carboxylic acid

Details Process for the preparation of carboxylic acid Process for the preparation of carboxylic acid

1978-07-03

1980-07-15

Helfin, Bernard

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

Organic compounds

Carboxylic acids and salts thereof

562564, 562565, 562566, 562572, 562575, C07C 5102

Patent

active

042129940

ABSTRACT:
A carboxylic acid is prepared by contacting an aqueous solution of the alkali metal or ammonium carboxylate with a liquid cation exchange agent dissolved in an organic solvent in which the carboxylic acid is substantially water immiscible. As an example, an aqueous solution of trisodium N-(2-hydroxyethyl)ethylenediaminetriacetate is contacted with di(2-ethylhexyl)phosphoric acid in kerosene to thereby form N-(2-hydroxyethyl)ethylenediaminetriacetic acid in the aqueous solution.

REFERENCES:
patent: 3439026 (1969-04-01), Patton
patent: 3574531 (1971-04-01), Schulz
patent: 3586476 (1971-06-01), Beutner et al.
Kunin, R., "Liquid Ion-Exchange Technology," Angew. Chem. Internat. Ed., vol. 1 (1962), 149-155.
Mogno, Yvon et al., "Extraction of Alkali and Alkaline Earth Metals by Dialkylphosphoric Acids," C. R. Acad. Sci., Paris, Ser. C (1968), 267(21), 1373-1376, (See Chem. Abstracts vol. 70 (1969) #100,207m.).
Kojima, Isao et al., "Extraction of Copper (II) and Sodium with Bis(2-Ethylhexyl) Hydrogen Phosphate," J. Inorg. Nucl. Chem. (1969) 31(6), 1815-1820, (See Chemical Abstracts, vol. 71 (1969), #25,157k).

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