Imperial College London
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Professor Tom Welton

Faculty of Natural Sciences, Department of Chemistry

Professor of Sustainable Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 5763t.welton Website

 
 
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Location

 

601AMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kuzmina:2017:10.1039/c7cp03540c,
author = {Kuzmina, O and Symianakis, E and Godfrey, D and Albrecht, T and Welton, T},
doi = {10.1039/c7cp03540c},
journal = {PHYSICAL CHEMISTRY CHEMICAL PHYSICS},
pages = {21556--21564},
title = {Ionic liquids for metal extraction from chalcopyrite: solid, liquid and gas phase studies},
url = {http://dx.doi.org/10.1039/c7cp03540c},
volume = {19},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We studied leaching of Cu and Fe from naturally occurring chalcopyrite ore using aqueous solutions of ionic liquids (ILs) based on imidazolium and ethylammonium cations and hydrogensulfate, nitrate, acetate or dicyanamide anions. Liquid, solid and gas phases of the leaching systems were characterised. We have shown that nonoxidative leaching is greatly dependant not only on temperature and pH, but on the anion species of the IL. Solutions of 1-butylimidazolium hydrogen sulfate exhibited the best leaching performance among hydrogen sulphate ILs. We have suggested that the formation of an oxide layer in some ILs may be responsible for a reduced leaching ability. The analysis of the gas phase showed the production of CO2 and CS2 in all leached samples. Our results suggested that the CS2 produced upon leaching could be responsible for decreasing the sulfur, but not oxide, layer on the surface of chalcopyrite samples and therefore more efficient leaching. This is the first study, to our knowledge, to provide a systematic comparison of the leaching performance of ILs composed of different anions and cations and without added oxidants.
AU  - Kuzmina,O
AU  - Symianakis,E
AU  - Godfrey,D
AU  - Albrecht,T
AU  - Welton,T
DO  - 10.1039/c7cp03540c
EP  - 21564
PY  - 2017///
SN  - 1463-9076
SP  - 21556
TI  - Ionic liquids for metal extraction from chalcopyrite: solid, liquid and gas phase studies
T2  - PHYSICAL CHEMISTRY CHEMICAL PHYSICS
UR  - http://dx.doi.org/10.1039/c7cp03540c
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000407765900039&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/53278
VL  - 19
ER  -
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