| Solvent extraction of nitric acid,uranium（VI） and thorium（IV） by N,N,N‘,N’—tetrahexylsuccinylamide |
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| 引用本文： | TANXufang SUNSixiu 等. Solvent extraction of nitric acid,uranium（VI） and thorium（IV） by N,N,N‘,N’—tetrahexylsuccinylamide[J]. 核技术(英文版), 1999, 10(1): 19-23 |
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| 作者姓名： | TANXufang SUNSixiu 等 |
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| 作者单位： | [1]LaiyangAgriculturalCollege,Laiyang265200 [2]DepartmentofChemistry,ShandongUniversity,Jian250100 |
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| 摘 要： | A new kind of diamide N,N,N‘,N‘-tetrahexylsuccinylamide(THSA) was synthesized,characterized and used for the extraction of HNO3,U(VI)and Th(IV) in a diluent composed of 0.5 volume fraction 1,2,4-trimethy benzene(TMB) and 0.5 volume fraction kerosene(OK),Extraction distribution coefficients of U(VI) and Th(IV) as functions of aqueous nitric acid concentation,extractant concentration.temperature and salting-out agent (LiNO3) have been studied,and it is found that THSA as an extractant is superior to TBP for extraction of U(VI) and Th(IV),Back Extraction was also studied.At low acidity,the main adduct of THSA and NHO3 is HNO3 is HNO3.THSA,THSA.(HNO3)2 and THSA.(HNO3)3 are also found at high acidity.The compositions of extracted species.apparent equilibrium constants and enthalpies of extraction reactions have also been calculated.
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| 关 键 词： | 铀 钍 硝酸溶剂提取 |
Solvent extraction of nitric acid,uranium(VI) and thorium(IV) by N,N,N',N'-tetrahexylsuccinylamide |
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| TAN Xufang,WANG Youshao,TAN Taizhe,YANG Yanzhao,BAO Borong,SUN Sixiu. Solvent extraction of nitric acid,uranium(VI) and thorium(IV) by N,N,N',N'-tetrahexylsuccinylamide[J]. , 1999, 10(1): 19-23 |
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| Authors: | TAN Xufang WANG Youshao TAN Taizhe YANG Yanzhao BAO Borong SUN Sixiu |
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| Abstract: | A new kind of diamide N,N,N',N'-tetrahexylsuccinylamide(THSA) was synthesized, characterized and used for the extraction of HNO_3, U(VI) and TI(IV) in a diluent composed of 0.5 volume fraction 1,2,4-trimethy benzene(TMB) and 0.5 volume fraction kerosene(OK). Extraction distribution coefficients of U(VI) and TI(IV) as functions of aque- ous nitric acid concentration, extractant concentration, temperature and salting-out agent (LiNO_3 ) have been studied, and it is found that THSA as an extractant is superior to TBP for extraction of U(VI) and TI(IV). Back extraction was also studied. At low acidity, the main adduct of THSA and HNO_3 is HNO_3.THSA. THSA.(HNO_3)2 and THSA.(HNO_3)_3 are also found at high acidity. The compositions of extracted species, apparent equilibrium constants and enthalpies of extraction reactions have also been calculated. |
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| Keywords: | N N N' N'-tetrahexylsuccinylamide Nitric acid Uranium(VI) Thorium(IV) Back extraction Salting-out agent |
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