PMTFP和Dipy对稀土离子的协同萃取

Synergic extraction of rare earth ions with PMTFP and Dipy

研究了1-苯基-3-甲基-4-三氟乙酰基-5-吡唑酮(PMTFP)和2.2’-联吡啶(Dipy)的氯仿溶液从硝酸介质中对镧(Ⅲ)、镨(Ⅲ)、钕(Ⅲ)、钆(Ⅲ)、钇(Ⅲ)、镝(Ⅲ)、镱(Ⅲ)和镥(Ⅲ)的协同萃取。用斜率法确定了协萃合物的组成为La(PMTFP)_3·Dipy。测定了它们的半萃取pH位。制得镧的固态协萃合物,作了元素分析,考察了红外和紫外吸收光谱及热稳定性。

The synergic extraction of some rare earth ions(La^(3+),Pr^(3+),Nd^(3+),Gd^(3+), Y^(3+),Dy^(3+),Yb^(3+),Lu^(3+))from nitric acid solution into mixture of l-phenyl -3-methyl-4-trifluoroacetyl-pyrazolone-5(PMTFP)and 2,2'-dipyridyl (Dipy)in trichloromethane are studied.The distribution ratio of rare earth ions for such mixture is greater than that of either component alone.By slop analysis mothod,the formula of the binary extracted compound of lanthanum and the formula of the synergic extracted compound are shown to be La(PMTFP)_3·Dipy.In addition,the pH values of half an extraction rate for La^(3+),pr^(3+),Nd^(3+),Gd^(3+),Y^(3+),Dy^(3+),Yb^(3+),Lu^(3+) are 3.81,3.29, 3.19,2.70,2.67,2.58,2.35,2.33,respectively at 303k.The synergic extrac- tion constants are determined for the ions.The solid synergic extraction compound of lanthanum is prepared and characterized by elemental analysis, infrared,ultraviolet and thermogravimetric analysis.Its molecular formula is LaC_(46)H_(32)N_8O_8F_9.