【摘要】 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．更多还原

【Abstract】 The extraction behaviour of (NH4)2SO4-biacetyl dioxine-ethanol system was studied and proper conditions were selected. It shows that the complex of Co2+ and biacetyl dioxime can be extracted into the ethanol phase, the precipitate of Ni2+ and biacetyl doixime floats between the two phases while the Fe3+ is left in the aqueous solvent at PH>5. It is concluded that Co2+ can be separated completely from Fe3+ and Ni2+ in the system.更多还原