| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 201576 | Fluid Phase Equilibria | 2013 | 4 Pages |
Two sulfate-based anion ionic liquids: 1-ethyl-3-methylimidazolium hydrogen sulfate [EMIM]+[HSO4]− and 1-ethyl-3-methylimidazolium methyl sulfate [EMIM]+[MeSO4]− were investigated as entrainer candidates for the separation of the binary azeotropic system acetone + methanol. Vapor–liquid equilibria (VLE) for the binary system acetone + methanol and the ternary mixtures with these sulfate-based anion ionic liquids were measured by headspace gas chromatography. From the experimental VLE data, the influence of the ionic liquid on the separation factors was investigated. The experimental results for the ternary systems show that the two ionic liquids investigated enhance the separation factor of the binary system acetone + methanol. The calculated separation factors of the two ionic liquids for the binary system acetone + methanol were compared with those of the ionic liquid hexylpyridinium bis(trifluoromethylsulfonyl)imide [HPY]+[BTI]−, and the conventional organic entrainers: ethylene glycol and water.
► This study investigates an entrainer for the separation of acetone and methanol for extractive distillation. ► Two ionic liquids (ILs) [EMIM]+[HSO4]− and [EMIM]+[MeSO4]− were investigated as entrainer. ► Ternary VLE containing these ILs were measured using headspace GC at 313 K. ► The separation factors are compared to those by other IL and organic entrainers. ► It can be concluded that these ILs have a great influence on the separation factor of the system acetone + methanol.
