Study on the floatation separation of indium with tetrabutyl ammonium bromide-potassium iodide-indium（Ⅲ） ternary complex
CAO Shu-qin1，SI Xue-zhi2,ZHONG Li1，SHEN Jiu-ming1, MA Wan-shan*1
1. College of Chemistry and Chemical Engineering , Xinyang Normal University, Xinyang 464000, China;2. College of Chemistry and Chemical Engineering，Henan University of Technology; Zhengzhou 450052, China
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-indium（Ⅲ） ternary complex. The results showed that In（Ⅲ） 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（Ⅲ） could be quantitatively floated and separated from Fe2+、Al3+、Mn2+、Sn、Ni2+、Zn2+、Cr3+、V（Ⅴ）、W（Ⅵ） 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.
曹书勤，司学芝，钟黎，沈久明，马万山*. 四丁基溴化铵-碘化钾-铟（Ⅲ）三元缔合物浮选分离铟的研究[J]. 冶金分析, 2011, 31(6): 77-80.
CAO Shu-qin，SI Xue-zhi，ZHONG Li，SHEN Jiu-ming, MA Wan-shan*. Study on the floatation separation of indium with tetrabutyl ammonium bromide-potassium iodide-indium（Ⅲ） ternary complex. , 2011, 31(6): 77-80.
