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《The Chinese Journal of Nonferrous Metals》 2005-05
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Extraction of copper from nickel and cobalt sulfate solution with BK992

GUO Hua-jun1, WANG Xiao-qiong1, LI Xin-hai1,ZHANG Xin-ming2, WANG Zhi-xing1, PENG Wen-jie1, XU Sheng-fei1(1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China; 2. School of Materials Science and Engineering, Central South University, Changsha 410083, China)  
Copper was extracted from nickel and cobalt sulfate with BK992. The effects of pH of aqueous solution, the phase ratio(O/A), concentration of BK992 and reaction time on the extraction were investigated. The results show that the extraction reaches equilibrium quickly. With increasing pH of the aqueous solution, the effect of copper extraction from the solution is improved greatly, but the mass loss of nickel and cobalt occurs when the pH is ~above 4.0. The bigger the O/A ratio is, the better the effect of the extraction is. With the increasing content of BK992, the distribution ratio of copper increases. The optimum conditions are determined that concentration of BK992 in the organic phase is 20% (volume fraction), the phase ratio (O/A) is 1∶2, pH of the aqueous solution is 3.0, and the reaction time is 10min. Under the optimized operating conditions, copper can be extracted effectively and the extraction rate at the first stage reaches 93.06%, the extraction capacity of BK992 is 17.30g/L and the stripping rate reaches ~91.79% , the pure transfer mass of copper is 15.88g/L.
【Fund】： 国家自然科学基金资助项目(50302016);; 中南大学博士后基金资助项目
【CateGory Index】： TF816
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