Desulfurization of diesel by oxidation/extraction scheme: influence of the extraction solvent

Oxidative Desulfurization of Gasoline by Ionic Liquids Coupled with Extraction by Organic Solvents

“…[17][18][19] The use of molecular organic solvents such as dimethylsulfoxide (DMSO), dimethylformamide (DMF) and acetonitrile in ODS has been patented; some problems, however, exist in employing these organic solvents such as loss, contamination, regeneration, recycling and safety issues stemming from the volatile nature of organic solvents. [20][21][22][23][24][25] Recently, ionic liquids (ILs) have attracted increasing attention thanks to their desirable physicochemical properties such as negligible volatility, easy alteration of cation/anion structure for specific applications, high thermochemical stability and remarkable ability in dissolving organic/ inorganic compounds. With wide-ranging applications in separation technology, nanotechnology, catalysis, electrochemistry, etc., ILs are being acclaimed as "green" and "designer" solvents.…”

Enhanced Oxidative Desulfurization of Dibenzothiophene by Functional Mo‐Containing Mesoporous Silica

“…In Fig. S1A (see Supporting Information), the peak at -3.96 ppm was due to the resonance of the central PO 4 [52]. On the other hand, for the meso-material 0.05Mo-SiO 2 (Fig.…”

“…To date, the conventional process for the removal of organosulfur in industry is known as hydrodesulfurization (HDS), which is highly efficient in removing aliphatic and acyclic sulfur-containing compounds such as thiols, sulfides, and disulfides [3], but less effective for thiophene sulfides such as DBT and its derivatives [4,5]. In addition, HDS is usually carried out under harsh conditions such as high temperature, high pressure, and high operating cost.…”

Evaluation of nitrogen effect on ultrasound-assisted oxidative desulfurization process

“…The presence of these hydroxyl groups increases polarity, enabling the use of alternative nitrogen removal methods such as adsorption and solvent based extraction. It is important to point out that the solvent in liquid-liquid oil extraction must present high polarity and be insoluble in fuel matrix [3,25]. Therefore, methanol, ethanol and water were evaluated as sol-vent in the extraction step.…”

“…In this process, sulfur and nitrogen compounds can be oxidized by some reagents as hy-drogen peroxide/formic acid [3], hydrogen peroxide/acetic acid [24] or hydroperoxide/MoO 3 -Al 2 O 3 [23]. Due to the higher polarity, oxidized sulfur or nitrogen compounds can be removed by a liquid-liquid extrac-tion or adsorption step [22,[25][26][27].…”