Citation: LIU Chao, ZHAO Long, WEI Yue-Zhou, HE Lin-Feng, TANG Fang-Dong. Solvent Extraction of Th4+ with TODGA in [C2mim][NTf2][J]. Chinese Journal of Inorganic Chemistry, ;2015, (1): 121-126. doi: 10.11862/CJIC.2015.009
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The extraction behavior of Th4+ from nitric acid solution with N,N,N',N'-tetraoctyldiglycolamide(TODGA) dissolved in hydrophobic ionic liquid [C2mim][NTf2] was studied. The effect of contact time, acidity, Th4+ concentration,TODGAconcentration and temperature on the extraction performance of TODGA/[C2mim][NTf2] system were investigated. For comparison, the same experiment in TODGA/isooctane system was also done. The results showed that the extraction of TODGA/[C2mim][NTf2] system against Th4+ was endothermic reaction and could balance within5 min at 50 ℃. The extraction efficiency decreased first and then increased with the increasing of acidity and Th4+concentration as well as decreasing of TODGAconcentration. It was found that TODGA/[C2mim][NTf2] system had better extraction efficiency than TODGA/isooctane system especially at low acidity. The extraction mechanism was suggested that at low acidity the extraction proceed via ion exchange mechanism to a coordination compound,and the mechanism at the high acidity was neutral complex.
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