Enhanced separation of praseodymium and neodymium by kinetic “push and pull” system of A336NO_3-DTPA in a column extractor
文献类型：期刊论文
| 作者 | Wang Xiaoqin2; Huang Kun2; Cao Wenjuan2; Sun Pan2; Sui Na1; Song Weiyuan2; Liu Huizhou2 |
| 刊名 | Journal of Rare Earths
 |
| 出版日期 | 2020 |
| 卷号 | 38期号:2页码:203 |
| ISSN号 | 1002-0721 |
| 关键词 | Praseodymium Neodymium Kinetic separation A336NO_3 DTPA Rare earths |
| 英文摘要 | A new approach was suggested in present work for improving the separation between Pr(III) and Nd(III) by a so-called kinetic "push and pull" system consisting of A336NO_3 and DTPA in a column extractor. It is revealed that, when organic extractant A336NO_3 is continuously pumped into the column extractor in the form of dispersed oil droplets and at the same time DTPA was injected into the aqueous feed solution when the extraction was just started, the separation factor of Pr(III) to Nd(III), β_(Pr/Nd), increased obviously with the time, and could even achieve 21.7. Such an amazing increase in β_(Pr/Nd) value might be due to the extraction rate of Pr(III) by A336NO_3 oil droplets being faster than that of Nd(III), while the complexing rate of Nd(III) with DTPA in the aqueous solutions being faster than that of Pr(III). The opposite order of the two rates for Pr(III) and Nd(III) result in their kinetic “push and pull” separation. In contrast, the β_(Pr/Nd) value in traditional thermodynamic separation reported in previous literatures is only around 5 or even less, even though using the same extractant A336NO_3 and DTPA but by previously adding DTPA into the aqueous feed solutions for pre-complexing of Pr(III) and Nd(III). Various effects from the pH and addition amount of DTPA aqueous solutions, LiNO_3 concentrations in initial aqueous feed solutions, the initial concentration ratios of Pr(III) to Nd(III) ions, the initial pH of aqueous feed solutions, and the concentrations of A336NO_3 in organic phases, on the kinetic separation of Pr(III) and Nd(III) are discussed. The present work highlights a promising approach for separation of rare earths or other targets with extreme similarity in physicochemical properties. |
| 资助项目 | [National Natural Science Foundation of China] ; [Key Project of Chinese National Programs for Fundamental Research and Development (973 Program)] |
| 语种 | 英语 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/46935]  |
| 专题 | 中国科学院过程工程研究所 |
| 作者单位 | 1.北京科技大学 2.中国科学院过程工程研究所 |
| 推荐引用方式 GB/T 7714 | Wang Xiaoqin,Huang Kun,Cao Wenjuan,et al. Enhanced separation of praseodymium and neodymium by kinetic “push and pull” system of A336NO_3-DTPA in a column extractor[J]. Journal of Rare Earths,2020,38(2):203. |
| APA | Wang Xiaoqin.,Huang Kun.,Cao Wenjuan.,Sun Pan.,Sui Na.,...&Liu Huizhou.(2020).Enhanced separation of praseodymium and neodymium by kinetic “push and pull” system of A336NO_3-DTPA in a column extractor.Journal of Rare Earths,38(2),203. |
| MLA | Wang Xiaoqin,et al."Enhanced separation of praseodymium and neodymium by kinetic “push and pull” system of A336NO_3-DTPA in a column extractor".Journal of Rare Earths 38.2(2020):203. |
入库方式： OAI收割
来源：过程工程研究所
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