Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Extraction/Separation of Cobalt by Solvent Extraction: A Review

용매추출에 의한 코발트 분리 기술

  • Swain, Basudev (Institute for Advanced Engineering, Advanced Materials & Processing Center) ;
  • Cho, Sung-Soo (Institute for Advanced Engineering, Advanced Materials & Processing Center) ;
  • Lee, Gae Ho (Department of Chemistry, Chungnam National University) ;
  • Lee, Chan Gi (Institute for Advanced Engineering, Advanced Materials & Processing Center) ;
  • Uhm, Sunghyun (Institute for Advanced Engineering, Advanced Materials & Processing Center)
  • ;
  • 조성수 (고등기술연구원 신소재공정센터) ;
  • 이계호 (충남대학교 화학과) ;
  • 이찬기 (고등기술연구원 신소재공정센터) ;
  • 엄성현 (고등기술연구원 신소재공정센터)
  • Received : 2015.11.13
  • Accepted : 2015.11.18
  • Published : 2015.12.10
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Abstract

Extraction/separation of cobalt by solvent extraction is reviewed. Separation of cobalt using various reagents and also cobalt recovery from scrap using commercial extractant were analyzed. The separation ability for cobalt followed the order of phosphinic > phosphonic > phosphoric acid due to the increasing stabilization of tetrahedral coordination of cobalt complexes with the extractant in the organic phase. Depending upon the solution composition, commercial extractants like Cyanex 272, D2EPHA and PC 88A should primarily be used for commercial extraction processes and also the efficient management of their combination could address various separation issues associated with cobalt bearing scrap.

용매추출에 의한 코발트 분리 기술에 대해 리뷰하였고 특히 다양한 시약을 사용한 코발트의 분리 및 상용 추출용제를 사용하여 스크랩으로부터의 코발트 회수기술에 대하여 분석하였다. 코발트 분리 능력은 phosphinic > phosphonic > phosphoric acid 순으로 정리되며, 이것은 유기상내에 추출용제와 존재하는 코발트의 사면체 배위 화합물의 안정성이 증가하기 때문이다. 용매의 조성에 따라 달라지지만 주로 Cyanex 272, D2EPHA 및 PC 88A와 같은 상용 추출용제 등이 상용 추출 공정에서 우선적으로 사용되어야 하며, 다양한 조합을 효과적으로 관리한다면 코발트 함유 스크랩과 관련한 다양한 분리기술 문제점들을 해결할 수 있을 것이다.

Keywords

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