料液中添加NH_4Cl对Sm^(3+)和Zn^(2+)萃取性能的影响

Effect of Adding NH4Cl to Feed Liquid on the Extraction Performance of Sm^(3+) and Zn^(2+)

采用1.5 mol/L P507-煤油为有机相,以SmCl_3和ZnCl_2的混合溶液作为料液,改变料液中添加NH4Cl浓度、料液酸度、Zn^(2+)浓度、有机皂化度、相比、混合时间,进行了Sm^(3+)和Zn^(2+)的萃取分离研究。结果表明,萃取分离Sm^(3+)和Zn^(2+)最佳的工艺参数为,有机皂化度为0.54 mol/L、料液中添加3 mol/L的NH_4Cl、料液酸度为0.15 mol/L、萃取相比O/A为2.5∶1以上,混合时间为4 min,Sm^(3+)和Zn^(2+)的最大分离因素βSm/Zn达到39.31。

The extraction separation of Sm^3＋and Zn^2＋was studied by using 1. 5 mol / L P507- kerosene as organic phase and mixed solution of SmCl3 and ZnCl2 as feed liqiuid. Effects of concentration of NH4Cl,feed acidity,concentration of Zn^2＋in the feed liuquid,organic saponification degree,phase ratio and mixing time on separation of Sm^3＋and Zn^2＋were investigated. The results show that the optimal process parameters of the extraction separation of Sm^3＋and Zn^2＋are organic saponification degree 0. 54 mol / L,concentration of NH4Cl 3 mol / L in the feed liuquid,the feed acidity 0. 15 mol / L,the phase ratio O / A more than 2. 5∶ 1 and the mixing time more than 4 minutes. The maximum separation factor of Sm^3＋and Zn^2＋βSm / Znwas39. 31.