Sulfur-containing low-temperature molten salt and application thereof in removal of aromatic sulfides in fuel oil

The invention provides sulfur-containing low-temperature molten salt and application thereof in removal of aromatic sulfides in fuel oil, the sulfur-containing low-temperature molten salt is obtained by chemical reaction of thiophene, benzothiophene, dibenzothiophene or naphthothiophene compounds with sulfuric acid diester, trifluoromethanesulfonate, phosphotriester, trifluoroacetic acid ester or sulfonate according to a molar ratio of 1: (1-1.05), and the sulfur-containing low-temperature molten salt is obtained by the chemical reaction of the thiophenes, benzothiophene, dibenzothiophene or naphthothiophene compounds, the sulfuric acid diester, the trifluoromethanesulfonate, the phosphotriester, the trifluoroacetic acid ester or the sulfonate. The product has high purity and stability. By adopting the sulfur-containing low-temperature molten salt as the extracting agent, the aromatic sulfides in the fuel oil can be removed at room temperature and normal pressure, and the removal rate is higher than 99.9%. Th