研究了1，2-双(1′-苯基-3′-甲基-5′-氧代 吡唑-4′-基)乙二酮-[1，2](H2A)与三正辛基氧化膦(TOPO)协同萃取RE(Ⅲ)(RE=La、Pr、Nd、Gd、Dy和Y)的性能。通过考察萃取剂浓度、溶液酸度和温度对RE(Ⅲ)萃取平衡的影响，确定了萃取机理和萃合物组成，求得了半萃取pH1/2值和萃取反应平衡常数Ks.e.。
The synergistic extraction properties and mechanism of RE(Ⅲ)(RE=La，Pr，Nd，Y，Gd and Dy)with 1,2-bis(1'-phenyl-3'-methyl-5'-pyrazolone-4'-yl)ethanedione-［1,2］(H2A)and tributyl phosphate(TOPO)have been studied in nitric acid solution at 30±1℃.The results show that there is a notable synergistic effect on La3+ for H2A+TOPO system,and the synergistic extraction coefficient of La3+ is calculated to be 4.4.By investigating the influence of concentrations of H2A and TOPO on the extraction of La3+,the composition of the extracted compound is determined as LaA*HA*TOPO. The half extraction pH1/2 values of La3+,Pr3+,Nd3+,Y 3+,Gd3+and Dy3+are 3.65，3.05，2.78，2.63，2.46 and 2.36,res pectively.Meanwhile,the extraction equilibrium constants,enthalpy change and ent ropy change of the reaction are also calculated.
参考文献
| [1] | 董学畅;刘复初;赵雁来 .几种新的4-酰基吡唑啉酮类螯合剂的合成[J].化学学报,1983,41(09):848. |
| [2] | LI Xiaojing;YAN Lan;Wanyan Hui et al.Chelate complexes of 1,3-bis-(phenyl-3′-methyl-5′-pyrazolone-4′-yl)-1,3-propanedione and 1,10-phenanthroline with lanthanide[J].Polyhedron,1993,12:2021. |
| [3] | 卢文;董学畅;任孝芬 等.1,10-双(1′-苯基-3′-甲基-5′-氧 代吡唑-4′-基)癸二酮-[1,10]对铁(Ⅲ)、钴(Ⅱ)和镍(Ⅱ)的萃取行为[J].应用化学,1991,8(06):92-95. |
| [4] | 刘建民;杨汝栋;彭万通 等.BPMOPP和1,10-菲咯啉对铈的协同萃取[J].应用化学,1994,11(01):1. |
| [5] | 张安运;钱博;何辉.双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮的合成及表征[J].化学通报(印刷版),1996(09):42. |
| [6] | 陈建海;王文清 .HPMBP与胺类萃取剂协同萃取U(Ⅵ)的研究[J].铀矿冶,1984,3(04):30. |
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