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Recovery of Mo by liquid-liquid extraction from synthetic leaching solution of spent Inconel 713C super alloy and preparation of Mo compounds

폐 인코넬계(Inconel 713C)내열합금 모의 침출액으로부터 액-액 추출법에 의한 Mo의 회수 및 Mo 화합물 제조

  • Ahn, Jong-Gwan (Department of Renewable Energy Resources, Jungwon University) ;
  • Kim, Da-young (Department of Renewable Energy Resources, Jungwon University) ;
  • In, Yong-Hyeon (Department of Renewable Energy Resources, Jungwon University)
  • 안종관 (중원대학교 신재생에너지자원학과) ;
  • 김다영 (중원대학교 신재생에너지자원학과) ;
  • 인용현 (중원대학교 신재생에너지자원학과)
  • Received : 2018.05.23
  • Accepted : 2018.08.03
  • Published : 2018.08.31

Abstract

Inconel 713C which of a commercial Ni super alloy have the composition of 70 % Ni, 12 % Cr, 6 % Al and 4 % Mo. Mo is very expensive and have some economic value to recover in the alloy. In this study, liquid-liquid exraction(solvent extraction and stripping) has been performed to separate Mo from the synthetic leaching solution of spent Inconel 713C alloy and prepare to Mo powder by dying, evaporation and heat treatment. The experiments were conducted by using synthetic leaching solution which was prepared $NaMoO_4$ $2H_2O$ by dissolved in distilled water. Alamine336 and Cyanex272 dissolved in kerosene were used as extractants. The extraction percentage of Mo by Alamine336 is 99 % in the condition of the range of pH 1 to 4 and 1 % of concentration of Alamine336. The stripping solutions are used by HCl, $H_2SO_4$ and $HNO_3$ solutions and the concentrations were controlled by distilled water. The concentrations of HCl, $H_2SO_4$ and $HNO_3$ as stripping solutions are increased, the stripping percentages of Mo are increased and the stripping percentage of Mo by $HNO_3$ is higher than other stripping solutions. After liquid-liquid extraction and heat treatment, $MoO_3$ powder which of the purity of 97.5 % was prepared.

Keywords

Mo;Solvent extraction;Stripping;$MoO_3$;Alamine336

Acknowledgement

Supported by : 에너지기술연구원

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