用ＬＩＸ８４的煤油溶液作萃取剂，从大洋多金属结核的催化还原氨浸溶液中选择性共萃铜和镍，而钴等留在萃余液中，然后选择反萃镍和铜，再生有机相循环使用，铜和镍溶液可用电积回收铜和镍。本工艺只需一种萃取剂便可有效地将铜、镍、钴三者彼此分离，操作简便，可用于处理大洋多金属结核或其它含铜、镍、钴的复杂矿 Using LIX84 kerosene solution as extractant, copper and nickel are selectively coprecipitated from the catalytically reduced ammonia leach solution of the polymetallic nodules of the ocean, while cobalt and the like are left in the raffinate and then stripped of nickel and copper by selective regeneration of the organic phase Recycled, copper and nickel solution can be recovered by electrowinning copper and nickel. The process only needs one extractant to effectively separate copper, nickel and cobalt from each other, and is easy to operate and can be used for processing polymetallic nodules or other complex ore containing copper, nickel and cobalt