Catalysis

Binary system

Non-random two-liquid model

Differential scanning calorimetry

Solvent

Physical chemistry

Thermodynamics

Physics

Extraction (chemistry)

Organic chemistry

Alloy

Activity coefficient

Mathematics

Eutectic system

Aqueous solution

Diethylene glycol

Analytical Chemistry (journal)

Chemistry

Ionic liquid

Ethylene glycol

Sulfolane

Binary number

Arithmetic

Journal of Molecular Liquids

The main aim of this research is to investigate the use of [HMMOR][Br] and its binary mixtures in desulfurization processes. In this case, the (solid + liquid) phase equilibrium, SLE data of binary mixtures composed of N-hexyl-N-methyl-morphoilinium bromide, [HMMOR] [Br] and diethylene glycol, or triethylene glycol, or sulfolane have been determined and discussed. Dynamic method and differential scanning calorimetry were used to obtain the experimental points with satisfactory repeatability. The experimental data were correlated using NRTL and Wilson equations. Ionic liquid (IL) tested in this work was synthesized and the structure was confirmed by NMR spectra. Basic thermophysical characterization of pure IL including melting temperature, Tm and enthalpy of melting, ΔmH were determined by DSC measurement. Based on the (solid + liquid) phase equilibrium measurements, the eutectic mixtures (EM) were chosen and their physicochemical properties such as density, ρ, and dynamic viscosity, η, were determined at temperature range T = (293.15–353.15) K with increment 5 K. Based on SLE data, the binary system for use in extraction of sulfur compounds from model fuel was selected. The binary system in which the highest amount of sulfur compounds were extracted, further work was carried out on the extraction of sulfur compound in the presence of an oxidizing agent such as (hydrogen peroxide + acetic acid), isobutyl aldehyde (IBA) and (isobutyl aldehyde (IBA) + oxygen). Additionally, the multiple extraction using {[HMMOR][Br] + diethylene glycol} was carried out. In order to design the extraction processes, the basic thermodynamic properties such as phase equilibria measurements are essential. The presented work is a valuable supplement to the data from the subject matter.

New experimental data on (solid + liquid) phase equilibria of N-hexyl-N-methylmorholinium bromide with glycols and sulfolane. The use of these binary systems in a sulfur extraction