| 1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2]与三正辛基氧化膦协同萃取RE(Ⅲ)的性能和机理研究 |
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| 引用本文： | 张安运. 1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2]与三正辛基氧化膦协同萃取RE(Ⅲ)的性能和机理研究[J]. 稀土, 2001, 22(1): 1-4 |
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| 作者姓名： | 张安运 |
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| 作者单位： | 陕西师范大学化学系, |
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| 摘 要： | 研究了1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2](H
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| 关 键 词： | 稀土元素；1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2]；三正辛基氧化膦；协同萃取 |
| 文章编号： | 1004-0277（2001)01-0001-04 |
| 修稿时间： | 2000-03-20 |
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| ZHANG An-yun. RE([J]. Chinese Rare Earths, 2001, 22(1): 1-4 |
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| Authors: | ZHANG An-yun |
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| Abstract: | 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. |
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