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Separation Science and Technology Volume 47, 2012 - Issue 2: Ionic Liquids: Challenging the Frontiers of Separations Processes
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Original Articles

On the Use of Ionic Liquids to Separate Aromatic Hydrocarbons from a Model Soil

Ana B. Pereiro Chemical Engineering Department, University of Vigo, Vigo, Spain; Instituto de Tecnología Química e Biológica, Oeiras, Portugal
,
Francisco J. Deive Chemical Engineering Department, University of Vigo, Vigo, Spain; Chemical Engineering Department, University of Santiago de Compostela, Santiago de Compostela, Spain
&
Ana Rodríguez Chemical Engineering Department, University of Vigo, Vigo, SpainCorrespondence[email protected]
Pages 377-385 | Received 23 May 2011, Accepted 13 Jul 2011, Published online: 03 Feb 2012
 
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Abstract

The potential of exploiting ionic liquids (ILs) for an ex situ solvent aromatic extraction technique is envisaged in this work, due to the serious proportions reached by this kind of contaminants associated with the industrial progress. 1-butyl-1-methylpyrrolidinium bis (trifluoromethylsulfonyl) imide, tetraalkyl ammonium sulfate, trihexyl (tetradecyl) phosphonium dicyanamide, 1-hexyl-3-methylimidazolium hexafluorophosphate, 1,3-dimethylimidazolium methyl sulfate, and 1-butyl-3-methylimidazolium methyl sulfate are proposed to efficiently extract benzene, toluene, and ethylbenzene at concentrations over the maximum allowable limit. The extraction procedure is completed with a washing and recycling step with the purpose of achieving a more competitive process.

ACKNOWLEDGEMENTS

We would like to thank CODISOIL S.A. for the financial support through the Project 08MDS044E.

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