| 超临界二氧化碳中TBP络合萃取硝酸钕 |
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| 引用本文： | 朱礼洋,段五华,徐景明,朱永(贝睿). 超临界二氧化碳中TBP络合萃取硝酸钕[J]. 原子能科学技术, 2010, 44(3): 266-271. DOI: 10.7538/yzk.2010.44.03.0266 |
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| 作者姓名： | 朱礼洋 段五华 徐景明 朱永(贝睿) |
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| 作者单位： | 清华大学 ;核能与新能源技术研究院，北京102201 |
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| 摘 要： | 将超临界流体萃取技术应用于乏燃料后处理中,可简化后处理流程、减少二次废液的产生。本工作进行了含磷酸三丁酯(TBP)的超临界二氧化碳(SC-CO2)络合萃取硝酸钕的实验研究,考察了硝酸钕粒径、TBP流量、系统温度和压力对络合萃取过程的影响。实验结果表明,含TBP的SC-CO2可高效萃取硝酸钕,萃取率达97%以上,增大TBP流量可加快萃取过程,而粒径、温度和压力对萃取速率的影响则较小。由实验结果可推断,该络合萃取过程的动力学受络合反应控制,并用一动力学模型计算出表观反应速率常数。
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| 关 键 词： | 超临界流体萃取 硝酸钕 动力学 乏燃料 磷酸三丁酯 |
Complexing Extraction of Neodymium Nitrate in Supercritical Carbon Dioxide With TBP |
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| ZHU Li-yang,DUAN Wu-hua,XU Jing-ming,ZHU Yong-jun. Complexing Extraction of Neodymium Nitrate in Supercritical Carbon Dioxide With TBP[J]. Atomic Energy Science and Technology, 2010, 44(3): 266-271. DOI: 10.7538/yzk.2010.44.03.0266 |
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| Authors: | ZHU Li-yang DUAN Wu-hua XU Jing-ming ZHU Yong-jun |
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| Affiliation: | Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 102201, China |
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| Abstract: | Reprocessing of spent fuel based on supercritical fluid extraction was intensively studied for its promising potential to reduce the secondary liquid waste generated.In this study,complexing extraction of neodymium nitrate hydrate in supercritical carbon dioxide containing tri-n-butyl phosphate(TBP) was investigated,more than 97% of the extraction efficiency was obtained.Effects of different particle sizes,TBP flow rates,temperature and pressure on the extraction efficiency were studied and discussed.It was... |
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| Keywords: | supercritical fluid extraction neodymium nitrate hydrate kinetics spent fuel TBP |
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