石油亚砜PSO3e萃取Au^(3+)的性能及机理研究  

Studies on the Performance and Mechanism of Extracting Au(Ⅲ)with PSO3e

作　　者：李艳莉[1] 古国榜[2] 

机构地区：[1]广东佛山科学技术学院化学系 [2]华南理工大学化工学院

出　　处：《贵金属》2001年第1期33-38,共6页Precious Metals

摘　　要：研究了石油亚砜PSO3e萃取Au3+时 ,萃取剂浓度、盐酸浓度对萃取率的影响。实验结果表明 ,在实验条件下 ,金的萃取率随着PSO3e的浓度和HCl的浓度增加而增加。还通过研究其它因素如Au3+、Cl- 、H+、PSO3e的浓度对分配系数的影响 ,确定萃合物的组成为HAuCl4·3PSO·mH2 O。此外 ,根据红外光谱研究萃取物的成键情况 ,得出PSO3e萃取Au3+的机理为酸性缔合机理 :H+3PSO(o) +mH2 O +AuCl4- 〔H·3PSO·mH2 O·AuCl4〕(o)The influence of the concentration of the extractant PSO3e and medium HCl on the extraction rate of Au 3+ was studied in this paper.The experiment results show that the extracting rate of Au 3+ increased along with the increase of PSO3e and HCl concentration under experiment conditions.The composition of extracted compound was deduced from the studies of other factors,such as the concentration of Au 3+ ,Cl -,H + and PSO3e,which affected the distribution coefficient.It was HAuCl 4·3PSO·mH 2O.The mechanism of extracting Au 3+ with PSO3e was also proposed here by studying their bonding condition with IR.The mechanism was H +3PSO (o) +mH 2O+AuCl -〔H·3PSO·mH 2O〕〔AuCl - 4〕 (o) .

关 键 词：石油亚砜 萃取 萃取率 金 萃取剂 

分 类 号：TF831.032[冶金工程—有色金属冶金]