Effect of polar molecular organic solvents on non-aqueous solvent extraction of rare-earth elements
文献类型：期刊论文
| 作者 | Dewulf, Brecht2; Cool, Vincent2; Li, Zheng1; Binnemans, Koen2 |
| 刊名 | Separation and Purification Technology
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 294 |
| 关键词 | Solvent extraction - Ethylene glycol - Rare earths - Ethylene - Chlorine compounds - Light absorption - Dimethylformamide - Polyols - Solvation - Rare earth elements - Hydrogen bonds |
| ISSN号 | 13835866 |
| DOI | 10.1016/j.seppur.2022.121197 |
| 英文摘要 | The extraction and separation of five different rare-earth elements, La, Nd, Eu, Dy and Yb, from an aqueous chloride solution and from different chloride non-aqueous solutions using the solvating extractant Cyanex 923 was investigated. As previous studies had demonstrated the potential of non-aqueous solvent extraction (NASX) to refine rare earths from ethylene glycol, structural analogues of ethylene glycol (1,2-propanediol and 1,3-propanediol) and to other polar organic solvents (triethylene glycol, dimethylsulfoxide, methanol, N,N-dimethylformamide and N,N-dimethylacetamide) were studied. The extraction data were interpreted in terms of different solvent properties: dielectric constant, Gutmann donor number, molecular structure and hydrogen-bonding capabilities. Remarkable differences were observed between the extraction behaviour from ethylene glycol, 1,2-propanediol and 1,3-propanediol. Therefore, these solvent systems were further studied to elucidate the speciation of the rare-earth elements by optical absorption and luminescence spectroscopy. Based on these studies, both contact-ion-pair formation and solvation strength are assumed to play an important role in the extraction of rare earths by Cyanex 923 from different polar organic solvents. The differences in extraction behaviour can be exploited to fine-tune the separation of rare earths. 漏 2022 The Author(s) |
| 学科主题 | Organic Solvents |
| 项目编号 | The research leading to this manuscript received funding from the European Union's EU Framework Programme for Research and Innovation Horizon 2020 under grant agreement no. 776846 (NEMO). |
| 出版者 | Elsevier B.V. |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/61207]  |
| 作者单位 | 1.CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 2.KU Leuven, Department of Chemistry, Celestijnenlaan 200F, P.O. box 2404, Leuven; B-3001, Belgium |
| 推荐引用方式 GB/T 7714 | Dewulf, Brecht,Cool, Vincent,Li, Zheng,et al. Effect of polar molecular organic solvents on non-aqueous solvent extraction of rare-earth elements[J]. Separation and Purification Technology,2022,294. |
| APA | Dewulf, Brecht,Cool, Vincent,Li, Zheng,&Binnemans, Koen.(2022).Effect of polar molecular organic solvents on non-aqueous solvent extraction of rare-earth elements.Separation and Purification Technology,294. |
| MLA | Dewulf, Brecht,et al."Effect of polar molecular organic solvents on non-aqueous solvent extraction of rare-earth elements".Separation and Purification Technology 294(2022). |
入库方式： OAI收割
来源：过程工程研究所
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