Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Separation of Gold and Silver from Diverse Solutions by Solvent Extraction

다양한 용액으로부터 용매추출에 의한 금과 은의 분리

  • Xing, Weidong (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Lee, Manseung (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University)
  • 행위동 (목포대학교 신소재공학과) ;
  • 이만승 (목포대학교 신소재공학과)
  • Received : 2017.06.30
  • Accepted : 2017.08.09
  • Published : 2017.10.31
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Abstract

Solvent extraction is an important process to recover pure gold and silver from various leaching solutions. The present work reviews the aqueous chemistry and solvent extraction separation of gold (I, III) and silver (I) from several leaching systems such as cyanide, thiocyanate, thiosulfate, thiourea and chloride medium. The extraction and separation behavior of gold (I, III) and silver (I) by various single and mixtures was compared on the basis of extraction reaction and the selectivity from these mediums. The chloride medium is recommended for the separation of gold and silver by solvent extraction in terms of extraction and stripping efficiency.

금과 은은 귀금속으로 첨단소재를 제조하는데 사용된다. 용매추출은 다양한 침출용액으로 부터 순수한 금과 은을 회수할 수 있는 중요한 공정이다. 본 논문에서는 cyanide, thiocyanate, thiosulfate, thiourea과 염산용액에서 금(I, III)과 은(I)의 용액화학 및 용매추출에 의한 분리를 고찰했다. 여러 단독 및 혼합추출제에 의한 금(I, III)과 은(I)의 용매추출 및 분리거동을 각 침출용액에서 추출반응과 추출제의 선택도를 토대로 비교했다. 염산용액이 용매추출에 의한 금과 은의 분리의 효율측면에서 적당하다.

Keywords

References

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