Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Solvent Extraction Separation of Nd and Pr from Chloride Solution using Organophosphorus Acid Extractants

염산용액에서 유기인산계 추출제에 의한 Nd와 Pr의 분리추출

  • Park, Joo-Ho (Department of Advanced Materials Science & Engineering, Mokpo National University) ;
  • Jeon, Ho-Seok (Division of Minerals Utilization and Materials, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Man-Seung (Department of Advanced Materials Science & Engineering, Mokpo National University)
  • 박주호 (목포대학교 공과대학 신소재공학과) ;
  • 전호석 (한국지질자원연구원 광물자원연구본부) ;
  • 이만승 (목포대학교 공과대학 신소재공학과)
  • Received : 2014.02.04
  • Accepted : 2014.03.18
  • Published : 2014.04.30
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Abstract

Solvent extraction experiments have been performed to separate Nd and Pr from chloride leaching solution of monazite sand using single Cyanex272 and mixed extractants as PC88A+Cyanex272 and PC88A+TBP. For this purpose, the effect of the concentration of extractants on the extraction and separation of the two metals were studied by varying the pH of aqueous solution. In the experimental ranges conducted in this study, the distribution coefficients of Nd were higher than those of Pr. In Cyanex272 system, our results indicated that concentration of extractant and initial pH did not affect distribution coefficients, but separation factor was increased with increasing initial pH. In binary extractant system, distribution coefficients were lower than those of single PC88A system, whereas separation factor was similar in both mixed and single extractant system.

Nd와 Pr이 함유된 모나자이트 샌드의 염산침출용액에서 Cyanex272 및 PC88A를 기반으로 한 TBP 및 Cyanex272와의 혼합용매를 사용하여 두 금속을 분리하기 위한 용매추출실험을 시행하였다. 이러한 목적을 위해 수상의 pH에 따른 추출제의 농도가 두 금속의 추출 및 분리에 미치는 영향을 조사하였다. 본 연구의 실험범위에서 Nd의 분배계수가 Pr의 분배계수보다 컸다. Cyanex272로 추출하는 경우 추출제의 농도와 초기 pH는 분배계수에 영향을 미치지 않으나, 초기 pH가 증가할수록 분리인자는 증가하였다. 혼합용매의 경우 PC88A를 단독으로 사용했을 때보다 분배계수가 낮고 분리인자에 차이가 없었다.

Keywords

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