PURIFICATION PROCESSING METHOD OF BETAINE TYPE SURFACTANT, AND PURIFIED BETAINE TYPE SURFACTANT

摘要

PROBLEM TO BE SOLVED: To provide a purification processing method of a betaine type surfactant capable of reducing each ion concentration of contained Cl, Na, Ca, Mg, Fe and Si to 5 ppm or less; and to provide a purified betaine type surfactant obtained by the purification processing method.SOLUTION: A betaine type surfactant containing each kind of ion properly at high concentration as impurities is served to an ion exchange method using a mixed resin of specific cation exchange resin and anion exchange resin so as to be subjected to purification processing.SELECTED DRAWING: None