| Titre : | Selection of ionic liquids as entrainers for the separation of ethyl acetate and ethanol (2009) |
| Auteurs : | Qunsheng Li, Auteur ; Jiguo Zhang, Auteur ; Zhigang Lei, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 19, Octobre 2009) |
| Article en page(s) : | pp. 9006–9012 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | Ionic liquidsMolecular structures Vapor− ; liquid equilibrium |
| Résumé : | This work tries to explore the relation between molecular structures of ionic liquids (ILs) as entrainers and separation performance on ethyl acetate (1) and ethanol (2). The vapor−liquid equilibrium (VLE) data have been measured for ethyl acetate (1) + ethanol (2) containing ILs at 101.32 kPa. The ionic liquids investigated were 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]+[BF4]−) and 1-methyl-3-octylimidazolium tetrafluoroborate ([OMIM]+[BF4]−), as well as 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM]+[BF4]−) that has been studied in our previous work. All the ILs could give rise to the salting-out effect. It was found that, at low IL concentration, the separation ability of ILs is in the order [EMIM]+[BF4]− > [BMIM]+[BF4]− > [OMIM]+[BF4]−, while at high IL concentration (x3 = 0.10−0.30) the separation ability of ILs is in the order [OMIM]+[BF4]− > [EMIM]+[BF4]− > [BMIM]+[BF4]− due to the difference of polarity of the three ILs and demixing effect. [EMIM]+[triflate]− was included as entrainer and compared with the tetrafluoroborate-based ILs. The measured ternary data were correlated using the NRTL model. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie8017127 |
