Selective Extraction of Uranium from a Mixture of Metal or Metal Oxides by a Tri-n-butylphosphate Complex with HNO_3 and H_2O in Supercritical CO_2
Selective Extraction of Uranium from a Mixture of Metal or Metal Oxides by a Tri-n-butylphosphate Complex with HNO_3 and H_2O in Supercritical CO_2
复制标题
超临界CO_2中磷酸三正丁酯与HNO_3和H_2O配合物从金属或金属氧化物混合物中选择性萃取铀
DOI：
10.2116/analsci.22.1387
复制
发表时间：
2006
影响因子：
1.6
通讯作者：
I. Yamamoto
中科院分区：
文献类型：
--
作者：
T. Shimada;Sinya Ogumo;Kayo Sawada;Y. Enokida;I. Yamamoto
为了研究在HNO_3、H_2O和磷酸三丁酯（TBP）的超临界二氧化碳（SC-CO_2）中，在某些金属化学品存在下，反应萃取铀的去污性能，测定了Sr、Zr、Mo、Ru、Pd、Ce和Nd与铀的混合物的去污因子（DF）。这些元素最初以SrO、ZrO_2、MoO_3、RuO_2、Pd、CeO_2和Nd_2O_3的形式加入到U_3O_8中，并在18 MPa和323 K下用单相混合物进行萃取。当萃取络合物中U与TBP的分子比大于0.3时，确定这些元素的DF大于10^3。SC-CO_2稀释能有效地提高DF。
In order to study the decontamination nature of the reactive extraction of uranium in the presence of some metal chemicals using a single-phase mixture of HNO_3, H_2O and tri- n -butylphosphate (TBP) in supercritical carbon dioxide (SC-CO_2), we measured the decontamination factors (DFs) of Sr, Zr, Mo, Ru, Pd, Ce and Nd from their mixture with U. These elements were originally added to U_3O_8 as SrO, ZrO_2, MoO_3, RuO_2, Pd, CeO_2 and Nd_2O_3, and the extraction was performed at 18 MPa and 323 K with the single-phase mixture. The DFs for these elements were determined to be greater than 10^3 when the molecular ratio of U to TBP in the extracted complex was greater than 0.3. Dilution by SC-CO_2 effectively increased the DFs.