Solvent Extraction Study of Rare Earths from Nitrate Medium by the Mixtures of TBP and D2EHPA in Kerosene

Authors

  • J. Kraikaew Chemistry and Material Science Research Program, Office of Atoms for Peace
  • W. Srinuttrakul Chemistry and Material Science Research Program, Office of Atoms for Peace
  • C. Chayavadhanakur Chemistry and Material Science Research Program, Office of Atoms for Peace

Keywords:

synergism, rare earths, TBP, D2EHPA

Abstract

The application of isomolar mixtures of tributylphosphate(TBP) and di-(2-ethylhexyl)phosphoric acid(D2EHPA) in kerosene at room temperature of 35+1oC for extractive separation of individual rare earths from mixed rare earth nitrate feed solution compared with 50%TBP in kerosene has been studied.  The distribution coefficients (Kd) and the synergistic coefficients [S=(Kd,a)TBP,D2EHPA/{(Kd,a)TBP+(Kd,a)D2EHPA}]  were investigated.  It was found that the Kd of heavy rare earths are higher when the solvents were 1.5 M and 1.0 M isomolar mixtures of TBP and D2EHPA in kerosene compared with 50%TBP in kerosene.  Ce gave significant synergism phenomenon (S>1) when the organic phase was 1.0 M isomolar (TBP-D2EHPA)/kerosene but La showed antagonistic effect (S<1) when 1.5 M isomolar (TBP-D2EHPA)/kerosene was the solvent.  The rest including Y performed synergism.

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References

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Published

2022-08-19

How to Cite

[1]
J. Kraikaew, W. Srinuttrakul, and C. Chayavadhanakur, “Solvent Extraction Study of Rare Earths from Nitrate Medium by the Mixtures of TBP and D2EHPA in Kerosene”, J Met Mater Miner, vol. 15, no. 2, pp. 89–95, Aug. 2022.

Issue

Vol. 15 No. 2 (2005)

Section

Original Research Articles

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Copyright (c) 2005 The Journal of Metals, Materials and Minerals (JMMM)

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