【摘要】 研究了四丁基溴化铵-碘化钾-铟(Ⅲ)三元缔合物浮选分离铟的行为及与一些金属离子分离的条件。结果表明,在水溶液中,In(Ⅲ)与四丁基溴化铵和KI形成不溶于水的三元缔合物InI4-.TBAB+,此三元缔合物沉淀浮于盐水相上层形成界面清晰的液-固两相。当溶液pH值为2.0,四丁基溴化铵和KI的浓度分别为6.0×10-4mol/L和5.0×10-3mol/L时,In(可与Fe2+、Al3+、Mn2+、SnⅥ、Ni2+、Zn2+、Cr3+、VⅤ、WⅥ和Co2+定量分离,且In(Ⅲ)的浮选率达到99.1%以上。对合成水样中In(Ⅲ)进行分离和测定,效果良好。该方法不污染环境,在痕量铟的分离和富集分析中有很好的实用价值。更多还原

【Abstract】 The behavior and conditions for the flotation separation of In Ⅲ from other metal ions were investigated with tetrabutyl ammonium bromide(TBAB)-potassium iodide-indiumⅢ ternary complex.The results showed that In could combin with TBAB and KI into a ternary ion association precipitate(InI4-·TBAB+) in aqueous solution.The precipitate could float well on the surface of aqueous phase,making the system divide into liquid and solid phases with a distinct interface.In could be quantitatively floated and separated from Fe2+,Al3+,Mn2+,SnⅥ,Ni2+,Zn2+,Cr3+,VⅤ,WⅥ and Co2+ with its floatation rate up to 99.1% when the concentrations of TBAB and KI in solution(pH 2.0) were 6.0×10-4 mol/L and 5.0×10-3 mol/L,respectively.The proposed method has been applied to the separation and determination of indium Ⅲ in synthetic water samples with satisfactory results.This method was environment-friendly,and it showed fine practical value in the separation and enrichment analysis of trace indium.更多还原