溶剂萃取法提取电镀污泥浸出液中的铜

The Copper Reovery from Electroplating Sludge by Means of Solvent Extraction

研究了N_(510)-煤油-H_2SO_4体系分离电镀污泥氨浸液中的Cu^(2+)的工艺过程,确定萃取铜的最佳工艺参数,以及负铜有机相反萃取较优工艺条件。研究结果表明,以N_(510)为萃取剂,经四级逆流萃取,铜的萃取效率达99％,共存的Ni^(2+)和Zn^(2+)损失量接近0,不影响后续有价金属的回收。铜在工艺过程中以铜盐CuSO_4·5H_2O或电解纯铜的形式得以回收,具有较高的经济效益。

A solvent extraction process for copper recovery from ammonia stripping solution of electroplating sludge was studide. The optimum operation parameters of each unit were determined in laboratory. The copper ion (II) in ammonia stripping solution was extracted by N510 (2-hydroxyl -5-secondary octyldipheny-ketoxime) -kerosene solution and extracted back by sulfuric acid solution. The copper recovery rate was more than 98%. Nickel and zine in solution were both not extracted. Copper sulfate (CuSO4·5H2O, C. P. ) or metal copper with high purity was obtained in this process.