Di (2-ethylhexyl) phosphoric acid (abbreviated as D2EHPA, commercially as P204), an available reagent, has been used in this work to investigate the extraction of gallium (III) and vanadium (IV) from sulfaric acid solution by the presence of various other metals, such as aluminium (III). The different parameters affecting the extraction of gallium (III) and vanadium (IV) under equilibrium conditions were separately investigated to obtain the extraction characteristics of D2EHPA. The distribution ratio of gallium and vanadium increased with increasing equilibrium pH of the aqueous phase, the concentration of the extractants and temperature. Gallium (III) and vanadium (IV) were predominantly extracted at low pHe and were completely separated from aluminum at pH = 2.0 with D2EHPA.

Keywords : Red Mud, Gallium (III), Vanadium (IV), Aluminum (III), Liquid Extraction, Degree Of Extraction, Distribution Coefficien