N910萃取碱性蚀刻废液中Cu(Ⅱ)的工艺研究  

Study on the extraction of Cu(Ⅱ) with N910 from alkaline etching liquid

作　　者：李雪梅[1] 蒋崇文[1] 苏爱鲜[1] 易牡丹[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《应用化工》2012年第5期811-814,818,共5页Applied Chemical Industry

基　　金：中日国际合作项目(2010DFA41440)

摘　　要：采用萃取剂N910为萃取剂,磺化煤油为稀释剂,研究了从碱性蚀刻废液中萃取回收铜的单级及多级萃取工艺。结果表明,在Cu2+含量为112 g/L,总氨浓度为5.7 mol/L的蚀刻废液中,单级萃取优化的工艺条件为:N910体积浓度为60%,有机相和水相的相比O/A=2∶1,T=30℃。碱性蚀刻液不需进行酸碱度的调整,萃取时间为3 min即可达到平衡,Cu2+的萃取率为56.73%,N910萃取Cu2+的饱和萃取量为64.03 g/L。萃取热效应△H=8.95 kJ/mol,萃取过程为吸热反应。在此条件下,PCB碱性蚀刻液中Cu2+的四级错流和三级逆流萃取率分别为94.78%和76.01%,蚀刻液中Cu2+浓度降低至37.98 g/L。Cu2＋ was extracted from alkaline etching liquid of PCB by using a commercial extractant N910 in the dilute agent sulfonated kerosene.With ethching liquid containing 112 g/L Cu2＋ and 5.7 mol/L NH3,the single stage and multistage extractive processes were investigated in detail.The optimum extraction conditions of single stage process were as follows：the concentration of N910 was 60%,organic phase and water phase of compared the phase ratio（O/A） was 2 ∶ 1 and the temperature was 30 ℃.It showed that the extraction percentage can reach 56.73% without the adjustment of pH value,and the saturated extraction of copper was 64.03 g/L after 3 min treatment.The thermal effects of extraction experimental（△H） was 8.95 kJ/mol.In addition,the extraction percentage with the processing of 4-stage cross-flow extraction can reach 94.78%.In comparison,the 3-stage countercurrent extraction was 76.01%.Correspondingly,the concentration of copper in the ethching liquid was 37.98 g/L.

关 键 词：蚀刻废液 溶剂萃取 Cu2+萃取率 

分 类 号：TF803.23[冶金工程—有色金属冶金] TF811