Liquid Extraction of Thiophene from n-Paraffins (C8, C10 or C12) Using Two Ionic Solvents [Mebupy][BF4] or [Emim][CH3SO4]

Abstract

Desulfurization of gasoline and diesel models is investigated through liquid-liquid extraction of thiophene (C 4 H 4 S) from n-para n compounds. Ionic solvents of 4-methyl-N-butylpyridinium tetra uoroborate [mebupy][BF 4 ] or 1-ethyl-3-methylimidazolium methylsulfate [emim][CH 3 SO 4 ] as selective solvents, have been evaluated at 313.15 K and atmospheric pressure of 101.3 kPa. Experimental liquid-liquid equilibrium (LLE) data for the six ternary systems of n-octane, n-decane or n-dodecane + thiophene + [mebupy][BF 4 ] or [emim][CH 3 SO 4 ], were used to calculate the values of the thiophene distribution ratio,selectivity and e ciency of ionic solvents. The experimental data were correlated using the UNIQUAC equations, and the binary interaction parameters have been reported. The phase diagrams for the ternary mixtures including both the experimental and calculated tie-lines have been presented.

Influence of Temperature, Anions, and Alkyl Chain Length on the Density, Viscosity, Speed of Sound, Surface Tension, and Refractive Index of Imidazolium Hexafluorophosphate-Based Ionic Liquids

“…The density of imidazolium-based ILs, for example, increases with increasing anion molecular weight, but it decreases with the increasing length of the alkyl-substituted chain attached to the cation or by inserting a third alkyl substituent on the imidazolium ring at the C2 position . ILs have been accepted as a new class of “green” solvents for practical applications including chemical and catalytic reactions, liquid and gas separation processes, − cleaning processes, biotechnology and nanotechnology, fuel cells, and electrolytes . The tunable solvent feature is probably the most appealing since it enables the desired property to be altered depending on the application by slightly altering the structure of the cation or anion.…”