高位阻β-二酮和LIX84混合萃取剂从氨性溶液中萃取铜  

Solvent extraction of copper from ammonia solutions by sterically hindered β-diketone and LIX 84

作　　者：向延鸿[1] 尹周澜[1] 冉盈[1] 胡慧萍[1] 陈启元[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《中国有色金属学报》2011年第5期1171-1177,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2007CB613601)

摘　　要：以Cu2+-NH3-Cl--H2O氨性溶液为被萃水相,研究高位阻β-二酮和LIX 84混合萃取剂对铜的萃取。考察混合萃取剂β-二酮和LIX 84总浓度及相对含量、被萃水相pH值及总氨浓度和相比等因素对铜萃取的影响。结果表明,最优萃取条件如下:β-二酮与LIX 84的体积比为1:1,萃取剂浓度为20%,水相铜离子浓度为3 g/L,总氨浓度为3 mol/L(氨与氯化铵的摩尔比为1:2),初始pH值为8.95,相比(O/A)为1:1,反萃剂(硫酸)浓度为90 g/L。在此最优条件下,铜萃取率接近100%,共萃氨量为36.1 mg/L,反萃率达97%。The extraction performance of copper with a sterically hindered β-diketone and LIX 84 from Cu2＋-NH3-Cl--H2O ammonia solutions was studied.The effects of extractant concentration,relative content of β-diketone and LIX 84 in organic phase,pH of aqueous phase,total ammonia concentration and phase ratio on copper extraction were tested.The results indicate that the optimum extraction conditions are as follows： the relative content of β-diketone and LIX 84 is 1：1,the concentration of extractant is 20%,the concentration of copper and total ammonia is 3 g/L and 3 mol/L,respectively,pH of aqueous phase is 8.95,phase ratio is 1：1,and the stripping concentration of sulphuric acid is 90 g/L.Under the optimum extraction condition,the extraction rate and stripping efficiency are nearly 100% and 97%,respectively,and the co-extraction ammonia is only 36.1 mg/L.

关 键 词：氨性溶液 萃取剂 萃取 铜 共萃氨 

分 类 号：TF811[冶金工程—有色金属冶金] TF804.2