A comparative study of pure ionic liquids and their mixtures as potential mass agents in the separation of hydrocarbons

作者：Gonzalez Emilio J; Navarro Pablo; Larriba Marcos; Garcia Julian^*; Rodriguez Francisco

来源：Journal of Molecular Liquids, 2016, 222: 118-124.

DOI：10.1016/j.molliq.2016.07.015

• Ionic liquids
• Ionic liquids mixtures
• Aromatic/aliphatic separation
• VLE
• HS-GC

In this work, a study about the use of pure ionic liquids (ILs) and mixtures thereof as'mass agents in the selective separation of n-heptane and toluene was carried out in order to compare the behavior of the ILs mixtures and the corresponding pure ILs. For that, the isothermal vapor-liquid equilibrium (VLE) data for {n-heptane + toluene + 1-ethyl-3-methylimidazolium tricyanomethanide ([EMim][TCMI) + 1-ethyl-3-methylimidazolium dicyanamide ([EMim][DCA])) and {n-heptane + toluene + IEMiml[TCM]1 mixtures were experimentally determined at several temperatures over the whole composition range within miscibility region. The experimental VLE data obtained in this work were compared with those previously published for {n-heptane + toluene + [EMim][DCA]}. Finally, the experimental VLE data, which were obtained using a static headspace gas chromatograph (HS-GC), were adequately correlated using the non-random two liquids (NRTL) thermodynamic model.
The obtained results confirm that ILs have an important effect on the VIE of systems containing n-heptane and toluene, which shows that these ionic solvents could be a promising alternative to carry out a selective separation of these hydrocarbons.

• 出版日期2016-10