双-(苯基-甲基-氧代吡唑基)乙二酮和邻菲咯啉协同萃取镧系元素  

Synergic Extraction of Lanthanide Ions by Bis-(1′-Phenyl-3′-methyl-5′-Pyrazol one-4′-yl)Ethanedione and Phenanthroline

作　　者：张安运[1] 钱博[1] 高改玲[1] 裴静[1] 王志纯[1] 

机构地区：[1]陕西师范大学化学系,西安710062

出　　处：《应用化学》1996年第3期90-92,共3页Chinese Journal of Applied Chemistry

摘　　要：4-酰代双吡唑酮是一类非环四齿β-二酮螯合剂.我们合成了双-（1′-苯基-3′-甲基-5′-氧代吡唑-4′-基）乙二酮（H₂BPMPED,简化为 H₂A）,研究了 H₂A 和邻菲咯啉（Phen）的氯仿溶液在 HNO₃介质中对 La³⁺、pr³⁺、Nd³⁺和 Gd³⁺的协同萃取.Ln₂O₃（Ln=La、Nd、Gd）,Pr₆O₁₁均为光谱纯,用浓 HNO₃（GR）溶解.蒸发近干。The extraction of lanthanide ions(La^(3+),Pr^(3+),Nd^(3+),Gd^(3+))from nitric acid solu- tion with mixtures of bis-(1′-phenyl-3′-methyl-5′-pyrazolone-4′-yl)ethanedione (H_2BPMPED or H_2A)and phenanthroline(phen)has been studied.The synergic extraction coefficent of neodymium is 3.56.The composition of extracted compound of neodymium is shown to be NdA·HA·phen.The pH values of half extraction of La^(3+),Pr^(3+),Nd^(3+),Gd^(3+) are 4.12,3.74,3.46,3.11 respectively.The extraction equilibrium constants enthalpy change and entropy change of the reaction have been calculated.

关 键 词：乙二酮 邻菲咯啉 协同萃取 镧系元素 

分 类 号：O614.33[理学—无机化学] O658.2[理学—化学]