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本文对环烷酸（HA）与异辛基3－吡啶酯（PE206）二元体系在盐酸介质中协同萃取镍的性能进行了研究，结果表明：与环烷酸单一体系比较，铜的萃取pH50向低pH方向移动10pH单位，镍的pH50向低pH方向移动1．4pH单位，而钴的pH50向低pH方向只移动0．7pH单位。镍与钴的ApH50增加0．6pH单位。
In this paper, the performance of synergistic extraction of nickel from naphthenic acid (HA) and isooctyl-3-pyridyl ester (PE206) binary system in hydrochloric acid medium was studied. The results showed that compared with the single system of naphthenic acid, Moving 10 pH units in the low pH direction, the pH of nickel shifted 1.4 pH units in the low pH direction and the pH of cobalt shifted only 0.7 pH units in the low pH direction. ApH50 for nickel and cobalt adds 0.6 pH units.