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Ionic liquid-based synergistic extraction of rare earths nitrates without diluent: Typical ion-association mechanism
Xiong, Ying1; Kuang, Wangqiang1,2; Zhao, Junmei2; Liu, Huizhou2
2017-05-31
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume179Pages:349-356
Abstract

The coexistence of tricaprylmethylammonium nitrate ([A336][NO3]) and Di(2-ethylhexyl) 2-ethylhexyl phosphonate (DEHEHP) has been found an obvious synergistic extraction effect for rare earths nitrates. In this work, synergistic extraction behaviors without any diluent for rare earth nitrates based on tri(hexyl)tetradecylphosphonium chloride (Cyphos (R) IL 101, [P66614][Cl]) and DEHEHP have been further investigated. Pr(III) was still used as a model RE, and the maximum synergistic extraction distribution ratio was obtained at a volume ratio of 2:3 for [P66614][Cl] and DEHEHP. The synergistic enhancement coefficients have been tested for the whole rare earths. Results show that there is an obvious synergistic enhancement effect for light REs (La-Sm) and an anti-synergistic effect for Gd-Lu including Y. The effects of acidity, anions and metal ion concentrations on the extraction have been investigated. The extraction mechanism has been confirmed to be the typical ion-association reactions. The maximum loading capacity is 0.78 mol/L Pr at 293.15 K. The extraction ability of [P66614][Cl]-DEHEHP is superior to that of reported [A336][NO3]-DEHEHP, and is also greater than that of common acidic organophosphate-kerosene extraction system. Stripping, recyclability, and selectivity between REs and non-REs, has also been investigated. (C) 2017 Elsevier B.V. All rights reserved.

KeywordCyphos (r) Il 101 Dehehp Synergistic Extraction Rare Earths Undiluted
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.seppur.2017.02.026
Indexed BySCI
Language英语
WOS KeywordDi-(2-ethylhexyl) 2-ethylhexyl Phosphonate ; Solvent-extraction ; Transition-metals ; Efficient Separation ; Green Separation ; Fluorine(i) ; Cerium(Iv) ; Ammonium ; Strategy ; Elements
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000397688200038
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22107
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Liaoning Univ, Coll Chem, Shenyang 110036, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Xiong, Ying,Kuang, Wangqiang,Zhao, Junmei,et al. Ionic liquid-based synergistic extraction of rare earths nitrates without diluent: Typical ion-association mechanism[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2017,179:349-356.
APA Xiong, Ying,Kuang, Wangqiang,Zhao, Junmei,&Liu, Huizhou.(2017).Ionic liquid-based synergistic extraction of rare earths nitrates without diluent: Typical ion-association mechanism.SEPARATION AND PURIFICATION TECHNOLOGY,179,349-356.
MLA Xiong, Ying,et al."Ionic liquid-based synergistic extraction of rare earths nitrates without diluent: Typical ion-association mechanism".SEPARATION AND PURIFICATION TECHNOLOGY 179(2017):349-356.
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