碘化钾-溴化十六烷基吡啶-水体系浮选分离钯(Ⅱ)的研究  

Study on floatation separation of palladium(Ⅱ) in potassium iodide-cetylpyrinium bromide-water system

作　　者：曹书勤[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

出　　处：《冶金分析》2008年第3期49-52,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-溴化十六烷基吡啶(CPB)-水体系浮选分离钯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,Pd(Ⅱ)与碘化钾、溴化十六烷基吡啶形成不溶于水的三元缔合物PdI42-.2CPB+,此三元缔合物可浮于水相上层,分成界面清晰的液-固两相。当溶液中碘化钾、溴化十六烷基吡啶的浓度分别为1.5×10-2mol/L,1.5×10-3mol/L,pH3.0时,Pd(Ⅱ)可与Zn(Ⅱ),Mn(Ⅱ),Al(Ⅲ),Ni(Ⅱ),Co(Ⅱ),Fe(Ⅱ)离子等定量分离,且Pd(Ⅱ)的浮选率达到99.4%以上。对合成水样的分离和测定,效果良好。The behavior and conditions for the floatation separation of Pd（Ⅱ） from other metal ions in potassium iodide-cetylpyrinium bromide-water system were studied. The results showed that Pd（Ⅱ） combines with KI and cetylpyridinium bromide to form a ternary ion associated complex PdI4^2-·2CPB^＋ in aqueous solutions, which was floated well on the surface of water phase to make the system to divide into both liquid and solid phases with clear interface. Pd（Ⅱ） could be quantitatively separated from Zn（Ⅱ）,Mn（Ⅱ）, AI（Ⅲ）, Ni（Ⅱ）, Co（Ⅱ） and Fe（Ⅱ）by floatation. The floatation rate of Pd（Ⅱ） was higher than 99.4 % at pH 3 when the concentrations of KI and cetylpyrinium bromide in solution are 1.5 X 10^-2 mol/L, 1.5 X 10^-3 mol/L, respectively. This method has been applied in the floatation separation and determination of Pd（Ⅱ） in synthetic water sample with satisfactory results.

关 键 词：钯(Ⅱ) 浮选分离 碘化钾 溴化十六烷基吡啶(CPB) 

分 类 号：O658.2[理学—分析化学]