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研究了硫酸铵－丁二酮肟－乙醇体系萃取Co（Ⅱ）的行为及乙醇与水溶液分相条件．试验表明，作为萃取溶剂的乙醇，能萃取带电络合物，当溶液pH＞5时，能使Co（Ⅱ）与Ni（Ⅱ），Fe（Ⅲ）分别在乙醇相、浮选相及水相中实现同一体系中三相分离．
The extraction behavior of Co (Ⅱ) by ammonium sulfate-dimethylglyoxime-ethanol system and the separation conditions of ethanol and aqueous solution were studied. The results showed that ethanol as extraction solvent could extract charged complexes. When pH> 5, Co (Ⅱ), Ni (Ⅱ) and Fe (Ⅲ) In the same system to achieve the three-phase separation.