| N，N，N′，N′-四丁基丙二酰胺从硝酸盐介质中萃取铈(Ⅲ) |
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| 作者姓名： | 崔玉 孙思修 徐荣琪 张振伟 张怀忠 孙国新 |
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| 作者单位： | 山东大学化学与化工学院，济南 250100;济南大学化学与化工学院，济南 250022,山东大学化学与化工学院，济南 250100,济南大学化学与化工学院，济南 250022,济南大学化学与化工学院，济南 250022,济南大学化学与化工学院，济南 250022,济南大学化学与化工学院，济南 250022 |
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| 基金项目： | 山东省学术骨干基金资助项目。 |
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| 摘 要： | Study on the extraction and separation of rare earth with new extractants is important in the rare earth chemistry and nuclear reprocessing. In this work， the extraction of Ce(Ⅲ) with N，N，N′，N′-tetrabutylmalonamide (TBMA) in toluene from nitrate media has been investigated. The effect of the concentration of nitric acid， TBMA and salt-ing-out agent (LiNO3) and also the temperature on the distribution ratios was examined. The stoichiometries of the extracted complexes were determined to be Ce(NO3)3·3TBMA and Ce(NO3)3·4TBMA， respectively. The ap-parent extraction constants and the enthalpy of the extraction were calculated based on the extraction data， which are logKex1=3.97， logKex2=4.75 and ΔrHm?=-31.25kJ·mol-1， respectively. The IR spectra of the loaded organic phase supported the suggested extraction mechanism.
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| 关 键 词： | N，N，N′，N′-四丁基丙二酰胺 萃取 铈(Ⅲ) |
| 修稿时间： | 2003-02-26 |
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