碘化钾-四丁基溴化铵-水体系浮选分离铱的研究  

Study on floatation separation of iridium in potassium iodide-tetrabutyl ammonium bromide-water system

作　　者：李玉玲[1] 司学芝[2] 梁晨曦[1] 马万山[1] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000 [2]河南工业大学化学化工学院,河南郑州450052

出　　处：《冶金分析》2011年第2期56-59,共4页Metallurgical Analysis

基　　金：河南省教育厅自然科学研究计划项目(2006150023)

摘　　要：研究了碘化钾-四丁基溴化铵-水体系分离IrⅣ的行为及IrⅣ与其他金属离子分离的条件。实验结果表明,在水溶液中,IrⅣ与四丁基溴化铵(TBAB)和碘化钾形成不溶于水的三元缔合物[IrI6][TBAB]2,此三元缔合物浮于水相上层形成界面清晰的液-固两相。当溶液中四丁基溴化铵和碘化钾的浓度分别为8.0×10-4mol/L和6.0×10-3mol/L,Ir(的浮选率达到97.6%,而RhⅢ、WⅥ、VⅤ、CeⅢ、SnⅣ、MoⅥ、UⅥ、GaⅢ、CrⅢ、MnⅡ、AlⅢ、FeⅡ、ZnⅡ、CoⅡ和NiⅡ离子在该体系中不被浮选,实现了IrⅣ与这些金属离子的定量分离。BiⅢ、SbⅢ和HgⅡ在该体系中有很高的浮选率,PbⅡ和CuⅡ与KI反应生成不溶于水的PbI2和CuI,所以IrⅣ不能和PbⅡ,CuⅡ,BiⅢ,SbⅢ和HgⅡ分离。对合成水样进行分离,效果较好。The separation behaviors and conditions of iridium from other metal ions were studied in potassium iodide-tetrabutyl ammonium bromide-water system.The results showed that IrⅣ could form water insoluble ternary complex（2） with tetrabutyl ammonium bromide and potassium iodide in aqueous solution.This ternary complex floated on water phase,and the liquid-solid two-phase was formed with clear interface.When the concentrations of tetrabutyl ammonium bromide and potassium iodide were 8.0×10-4 mol/L and 6.0×10-3 mol/L,the flotation rate of IrⅣ was up to 97.6 %.Meanwhile,RhⅢⅣⅥ,WⅥ,VⅤ,CeⅢ,SnⅣ,MoⅥ,UⅥ,GaⅢ,CrⅢ,MnⅡ,AlⅢ,FeⅡ,ZnⅡ,CoⅡ and NiⅡ were not floated in this system,realizing the quantitative separation of IrⅣ from these metal ions.BiⅢ,SbⅢ and HgⅡ had high flotation rate in this system.PbⅡ and CuⅡ could react with KI to form water insoluble PbI2 and CuI,so IrⅣ could not be separated from PbⅡ,CuⅡ,BiⅢ,SbⅢ and HgⅡ.The synthetic water sample was separated by this method with satisfactory results.

关 键 词：铱 四丁基溴化铵 碘化钾 浮选分离 

分 类 号：TF834[冶金工程—有色金属冶金]