乙醇-硫氰酸铵-硫酸铵体系绿色析相萃取分离铟  

Green phase extraction separation of indium by ethanol-ammonium thiocyanate-ammonium sulfate system

作　　者：曹书勤[1] 司学芝[2] 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》2014年第4期74-77,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：探讨了乙醇-硫氰酸铵-硫酸铵体系析相萃取分离铟的行为及与一些金属离子分离的条件。结果表明,硫酸铵能使乙醇水溶液分成两相,在分相过程中,In3+与硫氰酸铵生成的In(SCN)4-与质子化乙醇C2H5OH2+形成的缔合物[In(SCN)4-][C2H5OH2+]能被乙醇相完全萃取。当溶液中乙醇、硫氰酸铵和硫酸铵的浓度分别为30%(V/V)、7.0×10-3 mol/L和0.3g/mL时,In3+的萃取率达到98.1%以上,而Ce3+、Fe2+、Cd2+、Pb2+、Ni 2+、Mg2+、Cr3+、Ag+、V(Ⅴ)和Cu2+基本不被萃取,从而实现了In3+与上述金属离子的分离。对合成水样中铟的萃取分离和测定,效果良好。The extraction of ethanol-ammonium thiocyanate-ammonium sulfate on indium and the sepa- ration conditions of some metal elements were discussed. It showed that ammonium sulfate could sep- arate ethyl alcohol into two phases. During phase separation, the In（SCN）4- formed by In3＋ and ammo- nium thiocyanate reacted with protonated C2 H5 OH2 ＋ and generated complex [In（SCN）4-] [C2 H5OH2＋-] which could be completely extracted with ethanol phase. When the concentration of ethanol, ammoni- um thiocyanate and ammonium sulfate were 30 % （V/V）, 7.0 ×10^-3mol/L and 0.3 g/mL, the ex- traction efficiency of In3＋ was up to 98.1%. Ce3＋ , Fe2＋ , Cd2＋ , Pb2＋ , Ni2＋ , Mg2＋ , Cr3＋ , Ag＋ , V（V） and Cu2＋ were basically not extracted, thus realizing the separation of In3＋ from the above metal ions. The proposed method had a fine effect on the extraction and determination of indium in water sam- ples.

关 键 词：铟 乙醇 硫氰酸铵 硫酸铵 萃取分离 

分 类 号：O658.2[理学—分析化学]