CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
An ionic liquid-based synergistic extraction strategy for rare earths
Zhu, Menghao1,2; Zhao, Junmei1,3; Li, Yingbo1; Mehio, Nada3; Qi, Yuruo1,2; Liu, Huizhou1; Dai, Sheng3
2015
Source PublicationGREEN CHEMISTRY
ISSN1463-9262
Volume17Issue:5Pages:2981-2993
AbstractIn this work, a novel IL-based synergistic extraction system utilizing the ionic liquid tricaprylmethyl-ammonium nitrate ([A336][NO3]) and the commercial extractant di(2-ethylhexyl) 2-ethylhexyl phosphonate (DEHEHP) was developed for the extraction of rare earth (RE) nitrates. Pr(III) was used as a model RE and the effects of key factors, i.e. the ratio of [A336][NO3] to DEHEHP, the acidity of feed solutions, and the concentration of a salting-out reagent, were systematically studied. Our results demonstrate that the mixture of [A336][NO3] and DEHEHP had an obviously synergistic extraction effect for the extraction of Pr(III). The maximum synergistic enhancement coefficient of 3.44 was attained at X-A = 0.4 (v%). Alternatively, a mixture of [A336][Cl] and DEHEHP hardly extracted Pr(III) from chloride media. Moreover, we investigated the Pr(III) extraction mechanism and demonstrated that Pr(III) can be extracted as the neutral complexation species Pr(NO3)(3)center dot chi DEHEHP and the ion-type species [A336](y)center dot Pr(NO3)(3+y). These extraction processes can effectively hamper the release of organic cation-ligands into the aqueous phase. The synergistic extraction effect is mainly derived from the enhanced solubility of the extracted species in the ionic liquid phase. The extraction behaviors of Pr(III) could be properly described by Langmuir and pseudo-second-order rate equations. An increase in temperature was unfavorable for the extraction reaction but greatly improved the extraction rate. Interestingly, the mixed IL extraction system has an obviously synergistic extraction effect for light REs (LREs, La-Eu), but an anti-synergistic effect for heavy REs (HREs, Gd-Lu, Y), thus indicating that our synergistic extraction system is helpful for the separation of LREs from HREs. In addition, the high selectivity between REs and non-REs suggested that the recovery of REs from a complicated high-salt leachate could be highly possible. It demonstrates that the IL-based synergistic extraction strategy developed in this work is promising and sustainable, and as a result the development of an IL-based synergistic extraction process for the recovery of REs is straightforwardly envisaged.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c5gc00360a
Indexed BySCI
Language英语
WOS KeywordDI-(2-ETHYLHEXYL) 2-ETHYLHEXYL PHOSPHONATE ; SOLVENT-EXTRACTION ; NITRATE MEDIUM ; SELECTIVE EXTRACTION ; SUPERCRITICAL CO2 ; TRANSITION-METALS ; CYANEX 923 ; TEMPERATURE ; SEPARATION ; LANTHANIDES
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000354409500044
Citation statistics
Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19254
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA
Recommended Citation
GB/T 7714
Zhu, Menghao,Zhao, Junmei,Li, Yingbo,et al. An ionic liquid-based synergistic extraction strategy for rare earths[J]. GREEN CHEMISTRY,2015,17(5):2981-2993.
APA Zhu, Menghao.,Zhao, Junmei.,Li, Yingbo.,Mehio, Nada.,Qi, Yuruo.,...&Dai, Sheng.(2015).An ionic liquid-based synergistic extraction strategy for rare earths.GREEN CHEMISTRY,17(5),2981-2993.
MLA Zhu, Menghao,et al."An ionic liquid-based synergistic extraction strategy for rare earths".GREEN CHEMISTRY 17.5(2015):2981-2993.
Files in This Item:
File Name/Size DocType Version Access License
An ionic liquid-base(3091KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhu, Menghao]'s Articles
[Zhao, Junmei]'s Articles
[Li, Yingbo]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhu, Menghao]'s Articles
[Zhao, Junmei]'s Articles
[Li, Yingbo]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhu, Menghao]'s Articles
[Zhao, Junmei]'s Articles
[Li, Yingbo]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.