Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (2): 22 doi: 10.1007/s41365-019-0548-8

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Separation of hafnium from zirconium in hydrochloric acid solution with di(2-ethylhexyl)phosphoric acid by solvent extraction

Tao Yang1,2 • Guo-Xin Sun1 • Yuan Qian2 • Ji-Fei Ma2 • Yu-Lan Li2   

  1. 1 School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
    2 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2017-12-15 Revised:2018-03-06 Accepted:2018-03-19
  • Contact: Guo-Xin Sun E-mail:chm_sungx@ujn.edu.cn
  • Supported by:
    This work was supported by the Natural Science Foundation of Shandong Province (No. ZR201702160381).
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Tao Yang, Guo-Xin Sun, Yuan Qian, Ji-Fei Ma, Yu-Lan Li. Separation of hafnium from zirconium in hydrochloric acid solution with di(2-ethylhexyl)phosphoric acid by solvent extraction.Nuclear Science and Techniques, 2019, 30(2): 22     doi: 10.1007/s41365-019-0548-8

Abstract: The preparation of nuclear-grade zirconium and hafnium is very important for nuclear power. The separation of hafnium from zirconium in a hydrochloric acid solution by solvent extraction was investigated with di(2- ethylhexyl)phosphoric acid (D2EHPA). The effects of hydrochloric acid concentration, extractant concentration, diluents, and temperature on the distribution coefficient of hafnium and zirconium were studied. The species extracted were ZrOA2●2HA and HfOA2●2HA. In this process, the separation factors varied with different diluents and followed the order octane[hexane[toluene[chloroform. A high separation factor value of 4.16 was obtained under the conditions of a solution containing 0.05 mol/L HCl and 0.01 mol/L D2EHPA for the separation of hafnium from zirconium. The extraction reaction was endothermic.

Key words: Zirconium, Hafnium, D2EHPA, Solvent extraction, Separation