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Selective extraction of vanadium from chromium by pure [C(8)mim][PF6]: An anion exchange process
Hu, Qiaoyu1,2; Zhao, Junmei1; Wang, Fuchun1,2; Huo, Fang1; Liu, Huizhou1

Separations among vanadium(V) and chromium(VI) remain challenging. The extraction behaviors of V(V) along with Cr(VI) by a few of pure imidazolium-based hydrophobic ionic liquids have been investigated. Among these hydrophobic ionic liquids, [C(8)mim][PF6] exhibits a special extraction for V(V) while a weak extraction for Cr(VI). The extraction behavior of V(V) by [C(8)mim][PF6] was particularly studied. The extraction of V(V) is strongly dependent on the acidity of the aqueous phase, and the maximum separation factor between V and Cr (beta(V/Cr)) was calculated to be 100.6 in case of pH 3.5. The most probable extraction mechanism of V(V) has been proposed to be the anion exchange between the main species HV10O273- and PF6-. Furthermore, V(V) in IL phase can be quantitatively stripped by KPF6 solution under the basic condition (C-OH(-) = 1 mol/l). Recycle test indicates that the extraction capacity shows no apparent decline until the 9th continuous extraction-stripping cycle. The result also provides a new approach for the preparation of a novel ionic liquid with metal oxo-anions as counter anion. (C) 2014 Elsevier B.V. All rights reserved.

Keyword[c(8)Mim][Pf6] Vanadium(v) Chromium(Iv) Extraction
Subject AreaEngineering
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordTemperature Ionic Liquids ; Solvent-extraction ; Imidazolium ; Separation ; Metals ; Media ; Green ; Water
Funding ProjectMajor Project of NSFC [51090382] ; NSFC [51104138]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000338408800012
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorZhao, Junmei
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
Recommended Citation
GB/T 7714
Hu, Qiaoyu,Zhao, Junmei,Wang, Fuchun,et al. Selective extraction of vanadium from chromium by pure [C(8)mim][PF6]: An anion exchange process[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2014,131(JUN):94-101.
APA Hu, Qiaoyu,Zhao, Junmei,Wang, Fuchun,Huo, Fang,&Liu, Huizhou.(2014).Selective extraction of vanadium from chromium by pure [C(8)mim][PF6]: An anion exchange process.SEPARATION AND PURIFICATION TECHNOLOGY,131(JUN),94-101.
MLA Hu, Qiaoyu,et al."Selective extraction of vanadium from chromium by pure [C(8)mim][PF6]: An anion exchange process".SEPARATION AND PURIFICATION TECHNOLOGY 131.JUN(2014):94-101.
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