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| Electrolytic separation of high purity Sb powders from Pb-containing Sb alloy in deep eutectic solvent |
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Received:January 21, 2021
Revised:February 06, 2021
Accepted:February 07, 2021
Published Online:October 11, 2021
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| DOI： |
| KeyWord:Deep eutectic solvent; Electrolytic separation; Pb-containing Sb alloy; High purity Sb powders. |
| Author | Institution |
| FU Cheng-cheng |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
| HUA Yi-xin |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
| RU Juan-jian |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
| XUE Yu |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
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| 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. |
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