Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Calculation of Countercurrent Extraction Process for Separation of [Sm]/[Pr, Nd] in Hydrochloric Acid Solution using Cyanex 572

염산용액에서 Cyanex 572를 사용하여 [Sm]/[Pr, Nd] 분리를 위한 향류추출 공정변수 계산

  • Lee, Joo-eun (Department of Advanced Materials Sci. & Eng., Daejin University) ;
  • So, Hong-il (Department of Advanced Materials Sci. & Eng., Daejin University) ;
  • Jang, In-hwan (Department of Advanced Materials Sci. & Eng., Daejin University) ;
  • Ahn, Jae-woo (Department of Advanced Materials Sci. & Eng., Daejin University) ;
  • Kim, Hong-in (Covergence Research Center for Development of Mineral Resources (DMR) Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Jin-young (Covergence Research Center for Development of Mineral Resources (DMR) Korea Institute of Geoscience and Mineral Resources)
  • 이주은 (대진대학교 신소재공학과) ;
  • 소홍일 (대진대학교 신소재공학과) ;
  • 장인환 (대진대학교 신소재공학과) ;
  • 안재우 (대진대학교 신소재공학과) ;
  • 김홍인 (한국지질자원연구원 DMR융합연구단) ;
  • 이진영 (한국지질자원연구원 DMR융합연구단)
  • Received : 2018.10.02
  • Accepted : 2018.10.17
  • Published : 2018.10.31
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Abstract

For the purpose of optimizing the counter current extraction process for separation of [Sm] and [Pr, Nd] group in hydrochloric acid solution using Cyanex 572 as an extractant, the theory of Xu Guangxian was derived for calculating the optimized extraction factors. From the basic batch test result, the separation factor of [Sm]/[Pr, Nd] was 14.59 at pH 1.75 in extraction process and 14.61 at 0.01 M HCl in scrubbing process. The process parameters can be calculated using a theory of optimum extraction ratio. From the result of calculation, the total extraction and scrubbing stage numbers at counter current process were 11 and for maintain extraction ratio the flow rate ratio of feed solution, solvent solution, scrubbing solution was 6.25 : 1.74 : 5.80 using 0.1 M HCl.

추출제로 Cyanex 572를 사용하여 염산용액에서 [Sm]과 [Pr, Nd]그룹을 분리하기 위해 Xu Guangxian이 제시한 이론에 의하여 최적 향류 추출 공정 변수를 계산하고자 하였다. 기초실험으로부터, [Sm]/[Pr, Nd]의 두 그룹 최적 분리계수는 추출공정의 경우 pH 1.75에서 14.59, 세정공정에서는 0.01M HCl에서 14.61 이었다. [Sm]과 [Pr, Nd] 그룹분리에 필요한 공정 변수에 대해 계산을 하였다. 계산 결과 두 그룹의 희토류 분리에 필요한 총 추출 및 세정 단수는 11단이었으며, 최적추출비를 유지시키기 위해 필요한 원료용액, 추출용액 및 세정용액의 유량비는 0.1 M HCl을 사용하였을 경우 6.25 : 1.74 : 5.80 이었다.

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References

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