Solvent Extraction of Uranium with N,N-Di(2-Ethylhexyl)Octanamide from Nitric Acid Medium

被引：5
|
作者：
Tsutsui, Nao [1 ]
Ban, Yasutoshi [1 ]
Sagawa, Hiroshi [1 ]
Ishii, Sho [1 ]
Matsumura, Tatsuro [1 ]
机构：
[1] Japan Atom Energy Agcy, Nucl Sci & Engn Ctr, Res Grp Partitioning, Sirakata 2-4, Tokai, Ibaraki 3191195, Japan
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 2017年 / 35卷 / 06期
关键词：
Monoamide; N; N-dialkylamide; reprocessing; solvent extraction; uranium; MIXER-SETTLER EXTRACTORS; N; N-DIALKYL ALIPHATIC AMIDES; COUNTER-CURRENT EXTRACTION; TRI-N-BUTYLPHOSPHATE; DISTRIBUTION BEHAVIOR; FISSION-PRODUCTS; CHEMICAL SEPARATIONS; PROMISING EXTRACTANT; URANYL-NITRATE; U(VI);
D O I：
10.1080/07366299.2017.1362842
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Solvent extraction of uranium from a nitric acid medium was performed with N,N-di(2-ethylhexyl)octanamide (DEHOA) by a single-stage batch method, and the distribution ratio equation of U(VI) was derived as, where [NO3](aq) and [DEHOA(Free)](U) represented the concentration of nitrate ion in the aqueous phase and free DEHOA concentration in the organic phase, respectively. Furthermore, the nitric acid distribution was also evaluated in the initial nitric acid range of 0.317.2mol/dm(3) (M), and the distribution ratio equation was obtained as, where [H+](aq) and [DEHOA(Free)](H) represented the acid concentration in the aqueous phase and free DEHOA concentration in the organic phase, respectively. Batch experiments to evaluate the time dependence of U(VI) extraction and the U(VI) loading capacity of DEHOA were also performed. It was revealed that U(VI) extraction by DEHOA reached an equilibrium state within a few minutes, and the loading capacity was 0.71M when the concentrations of DEHOA and nitric acid were 1.5 and 3.0M, respectively.
引用
收藏
页码：439 / 449
页数：11
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