硫脲浸出液中银硫脲配合物各物种的分布  

Distribution of Silver Thiourea Complexes in Thiourea Leaching Solution

作　　者：孟智广[1] 李坚[1,2] 华一新[1,2] 张云[1] 王震[1] 张志[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]云南省复杂有色金属资源清洁利用国家重点实验室培育基地,云南昆明650093

出　　处：《昆明理工大学学报（自然科学版）》2013年第4期6-9,共4页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51274108)资助;昆明理工大学2009年科研基金(KKZ4200727003)

摘　　要：通过热力学平衡计算,绘制出不同配位数的银硫脲配合物的摩尔分数与硫脲浓度的关系曲线.结果表明,采用硫脲法回收含银物料中的银时,所得硫脲浸出液中银离子与硫脲主要形成[Ag(TU)]+、[Ag(TU)2]+、[Ag(TU)3]+和[Ag(TU)4]+四种配离子.对于硫脲总浓度为0.066mol/L、银离子总浓度为0.000 19 mol/L的溶液,银离子与硫脲主要形成[Ag(TU)3]+和[Ag(TU)4]+两种银硫脲配离子进入溶液,它们的摩尔分数分别为0.727 8、0.237 5,[Ag(TU)3]+为优势物种;而对于硫脲总浓度为0.66 mol/L,银离子总浓度为0.097 2 mol/L的溶液,银离子与硫脲也主要形成[Ag(TU)3]+和[Ag(TU)4]+两种银硫脲配离子进入溶液,但它们的摩尔分数分别为0.392 4、0.603 7,此时[Ag(TU)4]+为优势物种.The dependence diagrams of mole fractions of the silver thiourea complexes are presented based on the calculation results of thermodynamic equilibrium principle. complexes in the acidic thiourea leaching solution are in the forms of [ Ag （TU）] ^＋ on thiourea concentration The main silver thiourea , [Ag（TU）2]^＋, [Ag （ TU）3 ]^＋ and [Ag（ TU）4 ]^＋ Silver ions and thiourea mainly form [Ag （ TU）3 ]^＋ and [Ag（ TU）4 ]^＋ in the solu-tion with 0. 066 mol/L thiourea and 0. 000 19 mol/L silver ions, whose mole fractions are 0. 727 8 and 0. 237 5 respectively, with [ Ag （TU） 3 ] ^＋ being the dominant species ; Silver ions and thiourea also mainly form [ Ag （TU） 3 ]^＋ and [ Ag（TU）4 ] ^＋ in the solution with 0.66 mol/L thiourea and 0. 097 2 mol/L silver ions, but the mole fractions of them are respectively 0. 392 4 and 0. 603 7, with [ Ag（TU）4 ]^＋ being the dominant species.

关 键 词：银 硫脲 配合物 配离子 热力学 

分 类 号：TF832[冶金工程—有色金属冶金]