Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Separation of Molybdenum and Tungsten from Sulfuric acid Solution by Solvent Extraction with Alamine 336

황산용액에서 Alamine 336에 의한 용매추출로 몰리브덴과 텅스텐의 분리

  • Nguyen, Thi Hong (Department of Advanced Material Science and Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Lee, Man Seung (Department of Advanced Material Science and Engineering, Institute of Rare Metal, Mokpo National University)
  • Received : 2015.12.21
  • Accepted : 2016.01.22
  • Published : 2016.02.29
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Abstract

The separation behaviour of Mo and W from sulfuric acid solution by solvent extraction with Alamine 336 was investigated as a function of solution pH and extractant concentration. Selective extraction of Mo over W by Alamine 336 was obtained in the pH range of 3-5 with low amine concentration. The mixture of Alamine 336 and acidic extractants improved the separation factor between Mo and W and was in the following order: D2EPHA > PC88A > Decanol > Versatic acid. The stripping efficiency of Mo and W from the loaded mixture of Alamine 336 and D2EHPA was very poor, while complete stripping of Mo and W was possible from the mixture of Alamine 336 and Decanol by using a mixture of $NH_4OH$ and $NH_4Cl$.

황산용액에서 Alamine 336에 의한 몰리브덴과 텅스텐의 분리에 대해 수상의 pH와 추출제의 농도를 변화시키 며 조사했다. 수상의 pH가 3에서 5사이의 범위에서 낮은 농도의 아민에 의해 몰리브덴이 선택적으로 추출되었 다. Alamine 336과 양이온 추출제를 혼합하면 두 금속간의 분리인자가 다음 순서와 같이 증가했다 : D2EPHA > PC88A > Decanol > Versatic acid. Alamine 336과 D2EHPA의 혼합용매에서 몰리브덴과 텅스텐의 탈거율은 매 우 낮았으나, Alamine 336과 Decanol의 혼합용매의 경우 $NH_4OH$ 와 $NH_4Cl$의 혼합용액으로 두 금속을 모두 탈 거할 수 있었다.

Keywords

References

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