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以电镍含钴渣为原料，通过酸溶浸出，氧化还原除铜、铁矾除铁及氟化盐除碱土金属工序得到含高镍低钴混合料液；研究了采用２－乙基己基膦酸２－乙基己基酯萃取剂对钴、镍的萃取性能和分离系数的影响；探讨了钴、镍萃合物的电子光谱，并对所得到的固体萃合物的热性质进行测定，说明在不同萃取温度条件下，利用钴、镍萃合物的不同构型，在工艺上能有效地提高钴、镍的分离效率；对负载钴、镍有机相采用洗涤、反萃工艺，可使萃取余液中的钴、镍比达３００以上．
Electroless nickel cobalt slag was used as raw material to obtain high nickel and low cobalt mixed liquor through acid leaching, redox removal, vanadium iron removal and fluoride salt alkaline earth metal removal process. The effects of using 2-ethylhexylphosphine The effect of 2-ethylhexyl 2-ethylhexyl extractant on the extraction performance and separation coefficient of cobalt and nickel. The electronic spectra of the cobalt and nickel complexes were discussed. The thermal properties of the obtained solid extracts were also measured. Under different extraction temperature conditions, the different configurations of cobalt and nickel extracts can effectively improve the separation efficiency of cobalt and nickel in the process, and the washing and stripping process for cobalt and nickel-bearing organic phases can make extraction The remaining liquid cobalt, nickel ratio of 300 or more.