PURPOSE: To obtain a compound useful as a surfactant of high safety and quality in good yield by simple operation, by deacidifying or desalting an acid addition product of an aminocarboxylic acid (or a salt thereof) by electrodialysis.
CONSTITUTION: An acid addition product of an aminocarboxylic acid or an acid addition product of an aminocarboxylic acid salt is electrodialyzed. The electrodialysis is carried out by passing a DC current through an electrolytic solution present in a compartments (electrolyte compartments) adjacent thereto through membranes with the acid addition product of the aminocarboxylic acid (or salt thereof) present in compartments (organic material compartments) placed between two kinds of alternately arranged cation exchange membranes and anion exchange membranes. The acid or salt is transferred from the organic material compartments to the electrolyte compartments to afford the aimed substance.
YAMANISHI MASAHARU
SOTODANI KOSHIRO
KUBO MAKOTO
