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Removal of Al, Fe and Si from complex rare-earth leach solution: A three-liquid-phase partitioning approach
Alternative TitleSep. Purif. Technol.
Sui, Na1,2; Huang, Kun1; Lin, Jieyuan1,2; Li, Xiaopei1,2; Wang, Xiaoqin1,2; Xiao, Chuanxu1,2; Liu, Huizhou1
2014-04-30
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume127Issue:1Pages:97-106
AbstractA 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.; 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.
KeywordThree-liquid-phase Partitioning Rare Earths Fe Group Separation Al And Si
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.seppur.2014.02.035
URL查看原文
Indexed BySCI
Language英语
WOS KeywordLIQUID-LIQUID-EXTRACTION ; SOLVENT-EXTRACTION ; 2-PHASE SYSTEMS ; CHLORIDE SOLUTIONS ; AQUEOUS-SOLUTIONS ; PHASE-SEPARATION ; BEHAVIOR ; WATER ; ACID ; POLYMER
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000335874600012
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10959
Collection研究所(批量导入)
Affiliation1.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
Recommended Citation
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.
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