EFFECT OF ANIONIC SURFACTANT ON COPPER-EXTRACTION WITH E-2-HYDROXY-5-NONYL-BENZOPHENONEOXIME

The effect of the anionic surfactant sodium dioleylsulfosuccinate on the extraction rate of copper with E-2-hydroxy-5-nonylhenzophenoneoxime in n-heptane was studied. The extraction rate of copper was remarkably enhanced by the addition of the anionic surfactant under appropriate conditions and it was found that the electrostatic interaction between copper and the anionic surfactant and the binding between the extractant and surfactant in the interfacial zone played an important role in the extraction kinetics of copper with the extractant. An extraction mechanism of copper with E-2-hydroxy-5-nonylbenzaphenoneoxime in the presence of the surfactant was proposed. © 1990, The Society of Chemical Engineers, Japan. All rights reserved.