Purification of .alpha.-, .beta.- or .gamma.-substituted carboxy

Details Purification of .alpha.-, .beta.- or .gamma.-substituted carboxy Purification of .alpha.-, .beta.- or .gamma.-substituted carboxy

1998-01-27

1999-10-12

Nazario-Gonzalez, Porfirio

Liquid purification or separation

Processes

Utilizing electrical or wave energy directly applied to...

562580, B01P 1706, C07C 5142

Patent

active

059650320

ABSTRACT:
The process for purifying an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof from an aqueous solution which contains an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof and at least one polyol or at least one amino alcohol, wherein the solution is treated by electrodialysis.

REFERENCES:
Database WPIDS on STN, AN No. 94-000485, Habermann et al., `Dicarboxylic acids and diamine(s) from polyamide(s)-by cleavage with alcoholic base solution, distilling diamine and converting solid salt into corresponding diacid by electrolysis.` abstract of DE 4219756, 1993.
Chem. Berichte, 119, pp. 2191-2207, 1986.
J. Am. Chem. Soc., 77, p. 6008 (1955.).

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