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| Study on Salt Effect of Extraction and Separation of Zirconium and Hafnium in N263-HSCN System |
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Received:August 13, 2021
Revised:August 19, 2021
Accepted:August 23, 2021
Published Online:November 19, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.12.009 |
| KeyWord:N263; stability; extraction; separation; salt effect |
| Author | Institution |
| DONG Pan-fei |
中南民族大学资源与环境学院 |
| XU Zhi-gao |
中南民族大学资源与环境学院 |
| WU Ming |
中南民族大学资源与环境学院 |
| XU Fei |
中南民族大学资源与环境学院 |
| HE Zheng-yan |
中南民族大学资源与环境学院 |
| QU Jun |
中南民族大学资源与环境学院 |
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| Abstract: |
| irconium and hafnium were extracted and separated in N263-HSCN system with amyl acetate as diluent. Effects of types and concentrations of salting-out agents such as (NH4)2SO4, NH4Cl, NH4NO3, NaCl and MgCl2 on extraction and separation of zirconium and hafnium were studied. The results show that Hf is extracted preferentially in separation of Zr and Hf in N263-HSCN system, and the stability of SCN- in this system is stronger than that of in MIBK-HSCN system. The influence order of salting-out agents with different cations on extraction rate of zirconium and hafnium is NaCl > MgCl2 > NH4Cl, which is little effect on separation factors. The sequence of extraction rate of zirconium by different anionic salting-out agents is NH4NO3 > NH4Cl > (NH4)2SO4, the order of extraction rate of hafnium is (NH4)2SO4 > NH4Cl > NH4NO3, and the order of separation factors is (NH4)2SO4 > NH4Cl > NH4NO3, which is consistent with the order of anion hydration capacity. When addition of (NH4)2SO4 is 0.6 mol/L, separation coefficient is 18.56, extraction rate of zirconium and hafnium is 41.72% and 93% respectively. |
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