Liquid-liquid extraction and separation of gallium(III) with Cyanex 921

Abstract

1114-1116A simple and rapid method for the separation of gallium(III) from aqueous chloride media with tri-n-octylphosphine oxide (Cyanex 921) is described. Gallium(III) has been extracted with Cyanex 921 in toluene in the pH range 4.5-6.0 and stripped back with 2.0 M HNO3. The effects of pH, equilibration period, diluents, diverse ion and stripping agents on the extraction of gallium(III) have been studied. The equilibrium constant and the thermodynamic parameters,ΔH, ΔS and ΔG have been evaluated. The method has been extended for binary and multicomponent separation of gallium(III)