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用Ｎ２３５＋ＴＢＰ作萃取剂，Ｈ２Ｏ作反萃剂从大洋多金属结核盐酸浸出液除铁余液中萃取钴。ＨＣｌ浓度、Ｃｌ－浓度、Ｎ２３５浓度、相比对钴的萃取率有较大影响，而萃取时间则无明显影响。模拟试验结果表明，当平衡次数为１７～２１次时，钴的萃取率大于９７７％，反萃率大于９８％。
Using N235 + TBP as extractant and H2O as stripping agent, cobalt was extracted from iron remnant solution of oceanic polymetallic nodule hydrochloric acid leachate. HCl concentration, Cl- concentration, N235 concentration, compared to cobalt extraction rate has a greater impact, while the extraction time had no significant effect. The simulation results show that the cobalt extraction rate is more than 977% and the stripping rate is more than 98% when the equilibrium times are 17 ~ 21 times.