| Titre : | Liquid − liquid equilibrium data in ionic liquid + 4 - methyldibenzothiophene + n - dodecane systems (2010) |
| Auteurs : | Leonardo Hadlich de Oliveira, Auteur ; Martin Aznar, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 19, Octobre 2010) |
| Article en page(s) : | pp. 9462–9468 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Liquid equilibrium |
| Résumé : | In this work, liquid−liquid equilibrium data for 1-ethyl-3-methylimidazolium diethylphosphate ([emim][DEtPO4]) or 1-ethyl-3-methylimidazolium ethylsulfate ([emim][EtSO4]) + 4-methyl-dibenzothiophene (4-MDBT) + n-dodecane systems at 25 and 40 °C and atmospheric pressure (≈95 kPa) were determined by refractometry. 4-MDBT is a DBT derivative and it is one of the most difficult diesel sulfur pollutants to remove by the conventional process of hydrodesulfurization. The liquid−liquid equilibrium data were used to study the 4-MDBT extraction from n-dodecane as model diesel oil. 4-MDBT distribution coefficients, solvent selectivities, and extraction data also indicate that [emim][DEtPO4] is a better solvent for extractive desulfurization of n-dodecane than [emim][EtSO4]. For a solvent/n-dodecane mass ratio of 0.6, the sulfur content in n-dodecane decreases 17−24% and 5−15% for [emim][DEtPO4] and [emim][EtSO4], respectively. The quality of the data was ascertained by the Hand and Othmer−Tobias correlations, which presented R2 > 0.97 for all systems. The NRTL model was used to correlate the data and showed root-mean-square deviations of <0.15%. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie1009876 |
