구리, 니켈, 코발트 混合溶液으로부터 沈澱法에 의한 구리의 分離
Precipitation of Cu as the sulphide from Sulphate solution containing Cu, Ni and Co
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초록
구리, 니켈 그리고 코발트를 함유한 용액으로부터 구리를 선택적으로 분리하기 위하여 Na2S를 첨가하여 구리를 CuS로 침전시키는 연구를 행하였다. 구리의 침전율은 용액의 pH가 높을수록, 첨가한 Na2S의 양이 많을수록, 농도가 낮을수록, 반응온도와 반응시간이 증가할수록 증가하였다. pH 1, 20% Na2S 첨가량이 구리의 3 당량비, 온도 25oC 그리고 반응시간 30분에서 구리의 침전율은 94.1%이었으며 니켈과 코발트도 각각 4.3%와 4.5%가 침전되었다. 즉 일부 니켈과 코발트 이온이 같이 공침되기 때문에 정량적으로 구리만을 침전, 분리하는 것은 가능하지 않았다.
Abstract
The selective sulphide precipitation of copper from sulphate solution containing nickel and cobalt was studied with addingNa2S solution. Precipitation efficiency of copper increased with raising pH of solution and increasing the amount of Na2S adedand lowing its concentration. The increase in reaction time and temperature also improved the precipitation of copper. However,attempts to selectively precipitate copper met with limited success because of co-precipitation of nickel and cobalt. With adding20% Na 2S, 3 times equivalent of Cu, at pH 1.0 of solution, 25oC and 30 minutes of reaction time, precipitation eficiencies of copper, nickel and cobalt were 94.1%, 4.3% and 4.5% respectively.
참고문헌 (11)
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