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N,N,N’,N’-四丁基丙二酰胺从硝酸盐介质中萃取铈(Ⅲ)

Extraction of Ce(Ⅲ) with N,N,N′,N′-tetrabutylmalonamide from Nitrate Media

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【Author】 CUI Yu1,2 SUN Si Xiu*,1 XU Rong Qi2 ZHANG Zhen Wei2 ZhANG Huai Zhong2 SUN Guo Xin2 (1Collage of Chemistry and Chemical Engineering, Shandong University, Jinan 250100) (2Institute of Chemistry and Chemical Engineering, Jinan University, Jinan 250022)

【机构】山东大学化学与化工学院；济南大学化学与化工学院；济南大学化学与化工学院济南250100；济南250022；济南250100；济南250022；

【Abstract】 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?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 salting 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<IMG SRC="IMAGE/06170035.JPG" HEIGHT=11 WIDTH=24>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 =-31.25kJ·mol-1, respectively. The IR spectra of the loaded organic phase supported the suggested extraction mechanism.更多还原

【关键词】 N,N,N’,N’-四丁基丙二酰胺；萃取；铈(Ⅲ)；
【Key words】 N； N′； N′ tetrabutylmalonamide extraction cerium?；

【基金】山东省学术骨干基金资助项目。

【文献出处】无机化学学报 ,Chinese Journal of Inorganic Chemistry , 编辑部邮箱 ,2003年06期

【分类号】TF845
【被引频次】24
【下载频次】94

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