| 摘要 |
<p>4819 The invention relates to a liquid/liquid process for extracting metals from aqueous solution. The process comprises bringing into contact the aqueous solution with an organic phase containing at least one complex-forming agent insoluble in water and corresponding to the general formula: ; in which Z1 and Z2 represent an oxygen atom or a sulphur atom and may be the same or different and R1 and R2 which may be the same or different represent straight or branched alkyl, cycloalkyl, aryl or aralkyl groups containing at least one electron-attracting group, to extract the metal from the aqueous solution. The process is used to extract nickel, copper, uranium, molybdenum, lead, cadmium, cobalt, iron, zinc, vanadium, tin and tungsten. A second stage may be employed wherein the organic solution containing the metal is contacted with a second aqueous solution to strip the metal from the organic to the second aqueous solution.</p> |
