Transient- and steady-state concentration profiles in a DIAMEX-like countercurrent process for an(III)+Ln(III) separation

被引：19
作者：
Facchini, A
Amato, L
Modolo, G
Nannicini, R
Madic, C
Baron, P
机构：
[1] Politecn Milan, Dipartimento Ingn Nucl, I-20133 Milan, Italy
[2] ENEA, Saluggia, Italy
[3] Forschungszentrum Julich, Julich, Germany
[4] ENEA, Ispra, Italy
[5] CEA, DCC, Marcoule, Bagnols S Ceze, France
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2000年 / 35卷 / 07期
关键词：
liquid-liquid extraction; partitioning; transuranium elements; DIAMEX process;
D O I：
10.1081/SS-100100210
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new version of the DIAMEX (DIAMide EXtraction) process is reported to separate trivalent Am,Cm (An) and lanthanides (Ln) from a PUREX (Plutonium Uranium Refining by EXtraction by tributyl phosphate) process raffinate at a high aqueous/extractant flow-rate ratio while taking care of prevent third-phase formation. The process has been modeled by a computer program and tested on a 16-stage mixer/settler battery to perform extraction, scrubbing, and stripping to obtain an Am (representing the mixture of Am + Cm) decontamination factor (feed/raffinate) higher than 10(3) and a Mo + Zr fission product content in the product lower than 1 wt% of that of Am. Transient and steady-state concentration profiles of the solutes have been calculated and experimentally determined, and good agreement was generally observed.
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收藏
页码：1055 / 1068
页数：14
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