Dearomatization of pyrolysis gasoline by extractive distillation with 1- ethyl-3-methylimidazolium tricyanomethanide

Abstract

Propuesta de la destilación extractiva con líquidos iónicos para la separación de hidrocarburos aromáticos de las gasolinas de pirólisis. El líquido iónico 1-ethyl3-methylimidazolium tricyanomethanide ([emim][TCM]) ha sido el que mejores resultados ha obtenido.This work proposes the use of the extractive distillation with ionic liquids (ILs) for the separation of aromatics from pyrolysis gasoline to overcome liquid-liquid extraction limitations. Among all the ILs proved so far, 1-ethyl3-methylimidazolium tricyanomethanide ([emim][TCM]) stands as the most promising in the extractive distillation of aromatics due to its high and compensate aromatic/aliphatic selectivities and aromatic distribution ratios, high thermal stability, and low viscosity. The separation of benzene, toluene, and xylene (BTX) from a pyrolysis gasoline model was experimentally investigated to check the real suitability of the [emim][TCM] for extractive distillation.