Imperial College London
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Prof Jason P. Hallett

Faculty of Engineering, Department of Chemical Engineering

Professor of Sustainable Chemical Technology
 
 
 
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Contact

 

+44 (0)20 7594 5388j.hallett Website

 
 
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Location

 

228bBone BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Clarke:2020:10.1021/acs.iecr.9b04722,
author = {Clarke, CJ and Bui-Le, L and Corbett, PJ and Hallett, JP},
doi = {10.1021/acs.iecr.9b04722},
journal = {Industrial and Engineering Chemistry Research},
pages = {12536--12544},
title = {Implications for heavy metal extractions from hyper saline brines with [NTf2](-) ionic liquids: performance, solubility, and cost},
url = {http://dx.doi.org/10.1021/acs.iecr.9b04722},
volume = {59},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The bis(trifluoromethanesulfonyl)imide anion, [NTf2]−, can be paired with organic cations to give hydrophobic ionic liquids (ILs) that form secondary phases with water. These ILs are often identified as green solvents and considered as replacements for traditional organic solvents in chemical processes, i.e., aqueous biphasic extractions. Here, we consider a range of hydrophobic [NTf2]− ILs as extraction phases with hypersaline brines for heavy metal remediation. Extraction experiments were complicated by the partial solubility of the hydrophobic ILs, and ion chromatography was used to quantify the anion and cation losses to the aqueous phase. Although IL leaching was lower in hypersaline brine than in water (i.e., salting-out), IL losses were significant at relatively low volume ratios (Vaq/VIL) for short-chain and functional ILs. IL purity was also affected by cation exchange; more organic cations were lost to the aqueous phase than [NTf2]− anions. Solvent replenishment costs were extremely high due to loss to the aqueous phase and high IL prices. New separation technologies will be required if these ILs are to be used industrially; recovery is unlikely to offset the cost with current separation methodologies.
AU  - Clarke,CJ
AU  - Bui-Le,L
AU  - Corbett,PJ
AU  - Hallett,JP
DO  - 10.1021/acs.iecr.9b04722
EP  - 12544
PY  - 2020///
SN  - 0888-5885
SP  - 12536
TI  - Implications for heavy metal extractions from hyper saline brines with [NTf2](-) ionic liquids: performance, solubility, and cost
T2  - Industrial and Engineering Chemistry Research
UR  - http://dx.doi.org/10.1021/acs.iecr.9b04722
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000550637000025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.acs.org/doi/10.1021/acs.iecr.9b04722
UR  - http://hdl.handle.net/10044/1/82496
VL  - 59
ER  -
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