Separation of Pr and Nd from La in chloride solution by extraction with a mixture of Cyanex 272 and Alamine 336
- 170 Downloads
The possibility of separation of Pr and Nd from La in a chloride leaching solution of monazite sand has been investigated by using a binary mixture of Cyanex 272 (bis(2,4,4-trimethylpentyl) phosphinic acid) and Alamine 336 (tri-octyl/decyl amine). The binary mixture showed synergism on the extraction of the three metals and led to an increase in the separation factor between Pr/Nd and La compared to Cyanex 272 alone. Although the addition of chloride ion into aqueous increased the extraction of the metals, this addition had negative effect on the separation of Nd/Pr and La. McCabe-Thiele diagrams for the extraction of Pr and Nd with the binary mixture were constructed. Stripping of metals from the loaded organic phase was achieved with 0.7 M HCl. The difference in the solvent extraction of the rare earth elements from chloride solution between the binary mixture and saponified extractants was also discussed.
KeywordsREEs separation binary mixture Cyanex 272 Alamine 336
Unable to display preview. Download preview PDF.
- 3.G. M. Ritcey and A. W. Ashbrook, Solvent Extraction. Principles and Applications to Process Metallurgy, Vol II, pp.386–420, Elsevier, Amsterdam, the Netherlands (1984).Google Scholar
- 4.C. K. Gupta and N. Krishnamurthy, Extractive metallurgy of rare-earths, pp.172–200, CRC Press, New York (2005).Google Scholar
- 21.E. Padhana and K. Sarangia, J. Chem. Technol. Biotechnol. (In press).Google Scholar
- 34.T. H. Nguyen and M. S. Lee, Korean J. Met. Mater. 52, 799 (2014).Google Scholar