METHOD OF CLEANING LIQUID MOTOR FUEL FROM SULPHUR-CONTAINING COMPOUNDS Russian patent published in 2015 - IPC C10G21/06 C10G27/00 C10G17/00 C10G29/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of cleaning motor fuel, which includes extraction of sulphur-containing compounds from fuel into an ionic liquid, partial oxidation of the extracted sulphur-containing compounds under the action of a catalyst in an alcohol-alkaline solution or in an acidic aqueous solution, separation of the hydrocarbon fraction and reclamation of the ionic liquid. The ionic liquid used consists of: a cation selected from a group comprising alkylimidazolium, alkylpyridinium, polyalkylammonium, alkylpiperidinium, and an anion selected from a group comprising tetrafluoroborate, hexafluorophosphate, trifluoromethylsulphonate (triflate), bis(trifluoromethylsulphonyl)imide, nitrate, acetate, chloride, hydrosulphate. The ionic liquid is taken in volume ratio of 1:10-1:5 to the fuel to be cleaned. The catalyst is used in a solution containing at least one metal and/or metal oxide in a higher oxidation state with concentration of 1.0-40 mmol/l. The metal is selected from a group of transition metals which includes molybdenum, vanadium, tungsten, manganese and chromium. Mechanical agitation is carried out in a closed vessel at a temperature not higher than the boiling point of the fuel.

EFFECT: high degree of purity motor fuel.

18 cl, 2 tbl, 12 ex