A SEPARATION AND RECOVERY PROCESS OF GALLIUM AND INDIUM FROM ZINC REFINERY RESIDUE

摘要

The separation and recovery process of Ga and In from zinc refinery residue by liquid-liquid extraction with organophosphorus compounds, such as bis(2-ethylhexyl)phosphoric acid (D2EHPA), 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (EHPNA) and bis(2-ethylhexyl)phosphinic acid (PIA-226), was investigated. The extraction equilibrium formulations for Ga, In and Zn were established up to high loadings of the extractant. D2EHPA is the most suitable extractants for separation of Ga/In. The simulation for the separation and recovery process of Ga and In from zinc refinery residue was carried out based on the equilibrium studies, and showed that effective separation and recovery of Ga and In was carried out with high purity.