Preparation of di-[EMIM]CoCl3 Ionic Liquid Catalyst and Coupling with Oxone for Desulfurization at Room Temperature

The intermediate di-[EMIM]Cl was synthesized from methyl imidazole and 1,4-dichlorobutane then reacted with cobalt chloride at 105 °C to prepare a bi-[EMIM]CoCl3 ionic liquid catalyst. di-[EMIM]CoCl3 catalyst coupled oxone remove sulfur-containing organics in octane. characterized by HNMR, FTIR, TG, SEM–EDS. dibenzothiophene (DBT) dissolved octane model oil an initial sulfur content of 500 ppm. Six grams the added. results showed that optimal dosages di-[EMIM]CoCl3, (20 wt%), [BMIM]BF4 extractant were 1 g, 2 respectively. At optimum temperature 45 °C, 100% removed after 40 min. After recycled five times, removal percentage remained above 91%. percentages for different followed order > benzothiophene (BT) 4,6-dimethyldibenzothiophene (4,6-DMDBT). oxidation product determined be DBTO2 GC–MS analysis, mechanism discussed. active oxygen atoms oxidized DBT form DBTO, persulfate DBTO via identical mechanism.