Solvent extraction separation of Zr and Hf from nitric acid solutions by PC 88A and its mixture with other extractants

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• 作者：Lingyun Wang (1)
  Hwayoung Lee (2)
  Manseung Lee (1)
  
  1. Department of Advanced Material Science & Engineering ; Mokpo National University ; Channam ; 534-729 ; Korea
  2. Battery Research Center ; Korea Institute of Science & Technology ; P.O. Box 131 ; Cheongryang ; Seoul ; 130-650 ; Korea
  
• 关键词：Solvent extraction ; Zirconium ; Hafnium ; PC 88A ; nitric acid
• 刊名：Metals and Materials International
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：21
• 期：1
• 页码：166-172
• 全文大小：491 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials
  Operating Procedures and Materials Treatment
  
• 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
• ISSN：2005-4149

文摘

Solvent extraction for the separation of zirconium and hafnium from strong nitric acid solution has been investigated by using several organophosphorous acids (D2EHPA, PC 88A and Cyanex 272) and its mixture. Among the single extractants, PC 88A showed the best performance for the extraction and separation of the two metals. Mixtures of PC 88A with neutral, cationic and anionic extractants were tested in order to improve the separation between Zr and Hf. Mixtures of PC 88A with TBP or Versatic 10 or TOA did not show much influence on the extraction and separation of the two metals. Extraction efficiency of both Zr and Hf was markedly enhanced by using the mixture of PC 88A and TOPO. The mixture of PC 88A and LIX 63 led to synergism in the extraction of Zr, while antagonism occurred in the extraction of Hf. The highest separation factor of 46 was obtained from 2 M HNO3 solution by the mixture of PC 88A and LIX 63.