Removal of Al, Fe and Si from complex rare-earth leach solution: A three-liquid-phase partitioning approach
文献类型：期刊论文
| 作者 | Sui, Na1,2; Huang, Kun1; Lin, Jieyuan1,2; Li, Xiaopei1,2; Wang, Xiaoqin1,2; Xiao, Chuanxu1,2 ; Liu, Huizhou1
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| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2014-04-30 |
| 卷号 | 127期号:1页码:97-106 |
| 关键词 | Three-liquid-phase partitioning Fe Rare earths Group separation Al and Si |
| ISSN号 | 1383-5866 |
| 其他题名 | Sep. Purif. Technol. |
| 中文摘要 | A new strategy was suggested to remove Fe, Al and Si impurities from rare-earth leach solution by controlling partitioning and selective enrichment of those impurities and rare earths in three-liquid-phase systems. Experimental results indicated that aqueous pH value and addition of water-soluble complexing agents or their mixtures into initial aqueous solution have significant influence on three-liquid-phase partitioning of Fe, Al, Si and rare earths. When only 1,10-phenanthroline was added, Fe and Si can be "filtered" into PEG-rich middle phase of three-liquid-phase system (Cyanex 272/PEG 2000/(NH4)(2)SO4-H2O) without affecting separation of heavy and light rare-earth ions in top organic and bottom salt-rich phase, respectively. Al remained in bottom phase. However, addition of EDTA and 1,10-phenanthroline promoted enrichment of Fe, Al and Si into PEG-rich middle phase, and almost all of rare earths were concentrated in salt-rich bottom phase. Those rare earths in salt-rich phase after removal of impurities can be further separated by another three-liquid-phase system of Cyanex 272/PEG 600/(NH4)(2)SO4-H2O. Heavy, middle and light rare earths, Yb, Eu and La, can be selectively enriched into different liquid phases. Therefore, separation of non-rare-earth impurities from rare earths, and then between light, middle and heavy rare earths can be achieved by two stages of three-liquid-phase partitioning. The present work highlights three-liquid-phase system can be a potential separation media for removal of Fe, Al, Si from complex rare-earth leach solution and group separation of different target metals into different liquid phases. (c) 2014 Elsevier B.V. All rights reserved. |
| 英文摘要 | A new strategy was suggested to remove Fe, Al and Si impurities from rare-earth leach solution by controlling partitioning and selective enrichment of those impurities and rare earths in three-liquid-phase systems. Experimental results indicated that aqueous pH value and addition of water-soluble complexing agents or their mixtures into initial aqueous solution have significant influence on three-liquid-phase partitioning of Fe, Al, Si and rare earths. When only 1,10-phenanthroline was added, Fe and Si can be "filtered" into PEG-rich middle phase of three-liquid-phase system (Cyanex 272/PEG 2000/(NH4)(2)SO4-H2O) without affecting separation of heavy and light rare-earth ions in top organic and bottom salt-rich phase, respectively. Al remained in bottom phase. However, addition of EDTA and 1,10-phenanthroline promoted enrichment of Fe, Al and Si into PEG-rich middle phase, and almost all of rare earths were concentrated in salt-rich bottom phase. Those rare earths in salt-rich phase after removal of impurities can be further separated by another three-liquid-phase system of Cyanex 272/PEG 600/(NH4)(2)SO4-H2O. Heavy, middle and light rare earths, Yb, Eu and La, can be selectively enriched into different liquid phases. Therefore, separation of non-rare-earth impurities from rare earths, and then between light, middle and heavy rare earths can be achieved by two stages of three-liquid-phase partitioning. The present work highlights three-liquid-phase system can be a potential separation media for removal of Fe, Al, Si from complex rare-earth leach solution and group separation of different target metals into different liquid phases. (c) 2014 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | LIQUID-LIQUID-EXTRACTION ; SOLVENT-EXTRACTION ; 2-PHASE SYSTEMS ; CHLORIDE SOLUTIONS ; AQUEOUS-SOLUTIONS ; PHASE-SEPARATION ; BEHAVIOR ; WATER ; ACID ; POLYMER |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000335874600012 |
| 公开日期 | 2014-08-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/10959]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sui, Na,Huang, Kun,Lin, Jieyuan,et al. Removal of Al, Fe and Si from complex rare-earth leach solution: A three-liquid-phase partitioning approach[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2014,127(1):97-106. |
| APA | Sui, Na.,Huang, Kun.,Lin, Jieyuan.,Li, Xiaopei.,Wang, Xiaoqin.,...&Liu, Huizhou.(2014).Removal of Al, Fe and Si from complex rare-earth leach solution: A three-liquid-phase partitioning approach.SEPARATION AND PURIFICATION TECHNOLOGY,127(1),97-106. |
| MLA | Sui, Na,et al."Removal of Al, Fe and Si from complex rare-earth leach solution: A three-liquid-phase partitioning approach".SEPARATION AND PURIFICATION TECHNOLOGY 127.1(2014):97-106. |
入库方式： OAI收割
来源：过程工程研究所
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