Abstract:This paper presents a new method that electrolytic separation of high-purity Sb powders from Pb-containing Sb alloy in choline chloride-ethylene glycol eutectic solvent (ChCl-EG DES). The effect of CSbCl3 on the viscosity and electrical conductivity of SbCl3+ChCl-EG DES is tested at 343 K. The results show that with the increase of CSbCl3, the viscosity of SbCl3+ChCl-EG DES gradually increases, while the electrical conductivity is reverse. The anodic dissolution behaviors of Sb and Pb have been investigated by linear sweep voltammetry in SbCl3+ChCl-EG DES. The results show that the oxidation potentials of Sb and Pb are both about 0 V. It is beneficial to the electrolytic separation of Pb-containing Sb alloy, when the CSbCl3 increases from 0.05 M to 0.25 M. The results of electrolysis experiments show that agglomerated and irregular Sb powders with purity of 99.980% can be obtained at 343 K and 0.15 M SbCl3, and the corresponding current efficiency and specific energy consumption are 93.57% and 749.18 kW.h.t^-1, respectively.