DOI QR코드

DOI QR Code

Solvent Extraction of Rare Earth Elements (La, Ce, Pr, Nd, Sm) from Hydrochloric Acid Solutions using Cyanex 572

염산용액에서 Cyanex 572에 의한 희토류 원소(La, Ce, Pr, Nd, Sm)의 용매추출

  • Cho, Yeon-Chul (Department of Advanced Materials Sci. & Eng., Daejin University) ;
  • Kang, Myeong-Sik (Department of Advanced Materials Sci. & Eng., Daejin University) ;
  • Ahn, Jae-Woo (Department of Advanced Materials Sci. & Eng., Daejin University) ;
  • Lee, Jin-Young (Covergence Research Center for Development of Mineral Resources(DMR) Korea Institute of Geoscience and mineral Resources)
  • 조연철 (대진대학교 신소재공학과) ;
  • 강명식 (대진대학교 신소재공학과) ;
  • 안재우 (대진대학교 신소재공학과) ;
  • 이진영 (한국지질자원연구원 DMR융합연구단)
  • Received : 2016.10.28
  • Accepted : 2016.12.04
  • Published : 2016.12.31

Abstract

This work was examined the extraction and stripping behavior of rare earths (La, Ce, Pr, Nd, Sm) from the hydrochloric acid solution by Cyanex 572 and compared to the results that of PC88A. Experimental parameters such as equilibrium pH, extractant & strip reagent concentration were observed and extraction percentage, distribution coefficient, stripping percentage and the separation factor of the adjacent element were analyzed. The $pH_{50}$ values was more higher using Cyanex 572 than that of PC88A. As the increase of the extractant concentration, the distribution coefficient of rare earth elements was increased. Stripping percentage of rare earth elementss from the Cyanex 572 was 85% to 95% and PC88A showed 80% to 87%. Separation factor of Ce/La, Ce/Pr, Pr/Nd, Nd/Sm was enhanced about 1.0-5.0 using Cyanex 572 as an extractant in mixture solution.

염산용액에서 Cyanex 572에 의한 La, Ce, Pr, Nd, Sm의 추출 및 탈거 거동을 조사하여 PC88A를 추출제로 사용한 실험 결과와 비교하였다. 평형 pH, 추출제 농도, 탈거제 농도 변화에 대한 실험을 통하여 추출율, 분배계수, 탈거율 및 분리계수 값을 조사하였다. 실험 결과, Cyanex 572를 사용하였을 경우 PC88A 보다 희토류 원소들의 추출 시에 $pH_{50}$ 값이 더 높았고, 추출제 농도가 증가할수록 분배계수 값이 증가하였다. 희토류 원소가 추출된 유기상에서 염산용액으로 탈거 시 Cyanex 572의 경우는 탈거율이 85 ~ 95%로, PC88A의 탈거율 80 ~ 87%보다 높았고, 2성분계 혼합용액에서 Ce/La, Ce/Pr, Pr/Nd, Nd/Sm의 분리계수 값이 Cyanex 572를 사용한 경우가 PC88A에 비해 1.0 ~ 5.0 정도 커서 분리성이 개선되었다.

Keywords

References

  1. Man-Seung Lee, Gwang-Seop Lee, Jin-Young Lee, Sung-Don Kim, Joon-Soo Kim, 2004 : "Chemical Model on the Solvent Extraction of $NdCl_3\;and\;SmCl_3$ with Saponified PC88A" J. Kor. Inst. Met. & Mater., 42(10), 835-840.
  2. Gwang-Seop Lee, Jin-Young Lee, Sung-Don Kim, Joon-Soo Kim, Man-Seung Lee, 2004 : "Solvent Extraction of Nd from Chloride Solution with PC88A" J. of Korean Inst. of Resources Recycling, 13(4), 39-45.
  3. Man-Seung Lee, Jin-Young Lee, Joon-Soo Kim, 2008 : "Solvent Extraction for the Separation of Gd and Nd from Chloride with PC88A and Saponified PC88A" J. of Korean Inst. of Resources Recycling, 17(1), 12-19.
  4. Joo-Ho Park, Ho-Seok Jeon, Man-Seung Lee, 2013 : "Solvent Extraction Separation of Nd and Pr from Chloride Solution using PC88A and D2EHPA" J. of Korean Inst. of Resources Recycling, 22(5), 35-42. https://doi.org/10.7844/kirr.2013.22.5.35
  5. Gwang-Seop Lee, Jin-Young Lee, Sung-Don Kim, Joon-Soo Kim, Jang-Hyun Park, Man-Seung Lee, 2004 : "Solvent Extraction Equilibria of Gd with PC88A for Chloride Solution" J. of Korean Inst. of Resources Recycling, 13(2), 24-32.
  6. Joo-Ho Park, Ho-Seok Jeon, Man-Seung Lee, 2014 : "Solvent Extraction Separation of Nd and Pr from Chloride Solution using Organophosphorus Acid Extractants" J. of Korean Inst. of Resources Recycling, 23(2), 37-45. https://doi.org/10.7844/kirr.2014.23.2.37
  7. Man-Seung Lee, Gwang-Seop Lee, Jin-Young Lee, Sung-Don Kim, Joon-Soo Kim, 2005 : "Solvent Extraction Separation of Nd and Sm from Chloride Solution with PC88A and Saponified PC88A" J. of Korean Inst. of Resources Recycling, 14(2), 33-42.
  8. M.D. Soderstrom, T. McCallum, B. Jakovljevic, A. J. Quilodran, 2014 : "Solvent extraction of rare earth elements using Cyanex$^{(R)}$572" Conference of Metallurgists Proceedings.
  9. Yanliang Wang, Fujian Li, Zeyuan Zhao, Yamin Dong, Xiaoqi Sun, 2015 " The novel extraction process based on Cyanex 572 for separating heavy rare earths for ion-adsorbed deposit" Separation and purification Technology, 151, 303-308. https://doi.org/10.1016/j.seppur.2015.07.063
  10. Tyler McCallum, Matthew Soderstrom, Alejandro Quiloran, Boban Jakovljevic, 2014 : "Solvent extraction of rare earth elements using Cyanex$^{(R)}$572" ALTA 2014 Uranium-REE Proceeding.
  11. Xianglan Wang, Mo Du, Hui Liu, 2014 : "Synergistic extraction study of samarium(III) from chloride medium by mixtures of bis(2,4,4-trimethylpentyl)phosphinic acid and 8-hydroxyquinoline" Separation and purification Technology, 93, 48-51.
  12. James Quinn, Karin Soldenhoff, Geoff Stevens, 2014 : "Separation of rare earth elements using Cyanex 572" International Solvent Etraction Conference, 47-52.
  13. James E. Quinn, Karin H. Soldenhoff, Geoff W. Stevens, Nigel A. Lengkeek, 2015 : "Solvent extraction of rare elements using phosphonic/phosphinic acid mixtures" Hydrometallurgy, 157, 298-305. https://doi.org/10.1016/j.hydromet.2015.09.005