Journal of Northeastern University ›› 2008, Vol. 29 ›› Issue (8): 1139-1142.DOI: -

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Study on distribution ratio and separation coefficient of cerium and praseodymium in P204-HCl-H3cit system

Chang, Hong-Tao (1); Wu, Wen-Yuan (1); Bian, Xue (1); Tu, Gan-Feng (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-08-15 Published:2013-06-22
  • Contact: Chang, H.-T.
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Abstract: The effects of the feed acidity and citric acid (H3cit) concentration on the distribution ratio and the separation coefficient of Ce(III) and Pr(III) and the extraction capacity were investigated in P204-HCl-H3cit system. The result showed that the distribution ratio and the separation coefficient both decrease with increasing feed acidity and increase with increasing citric acid concentration, and the extraction capacity increases with increasing citric acidity concentration in P204-HCl-H3cit system. The mechanism of the increase of the separation coefficient of Ce(III) and Pr(III) was analyzed by FT-IR spectra. When citric acid concentration is 0.25 mol·L-1 and pH value of feed acidity is 1.0, the maximum separation coefficient comes up to 1.71 with maximum extraction capacity 27 g/L. The performance index is therefore proved superior to that in saponified P204-HCl system.

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