Co、Ni离子分离研究

Separation of Ni(Ⅱ) and Co(Ⅱ) Ions

采用电渗析与萃取耦合的集成方法,实现混合溶液体系中Co2+、Ni2+分离。在分离条件上,通过选取和设置萃取剂皂化率、原料的质量配比、原料同萃取剂的摩尔配比、加酸方式、酸用量、循环处理、萃取剂是否回用等因素及其不同水平,以考察它们对离子分离程度的影响。实验结果:萃取剂皂化率60%、原料中NiCl2·6H2O与CoCl2·6H2O的质量配比1:2、原料同萃取剂的摩尔配比1:1.7、一次性加酸、酸用量取理论用量的1.3倍为优取的分离工艺条件。另外,离子分离过程可采取料液循环、萃取剂再皂化后回用的多级操作;电流效率达80%以上。由此得到,电渗析与萃取耦合的技术可分离Co2+和Ni2+。

Ionic separation of Ni2+ and Co2+ from their mixed solution system by the integrated electrodialysis and extraction method was studied. The effects of several effecting factors of the proposed separating method, such as the saponification ratio of extractant, the mass ratio of raw materials, the molar ratio of raw materials to extractant, the way of adding acid and the amount of added acid, on the ionic separation factor were investigated. Moreover, whether or not the feed solution ought to be recycled and ...