METHOD FOR PURIFYING GASOLINE FROM SULFUR IMPURITIES Russian patent published in 2017 - IPC C10G31/06 B01D3/42 B01D3/32 

FIELD: oil and gas industry.

SUBSTANCE: purification of petroleum products is carried out in a distillation column under the conditions of cyclically variable pressure, at which a portion of vapors of the gasoline to be cleaned is fed successively to the separation volume of each tray, starting from the top one, at a pressure exceeding the vapor pressure in this separation volume and in an amount sufficient for complete condensation of the vapors in the volume. Each elementary volume of vapor, when moving from a cube to a fractional column, is exposed to 5 to 30 such short-acting pulses. The method allows purifying petroleum products from sulfur compounds without the use of additional reagents, and by the degree of purification it exceeds the known ones by approximately 10 times.

EFFECT: this method can be used for purifying liquids from slow evaporating impurities or in the case where the majority of the mass transfer resistance is concentrated in the vapor phase.

3 cl, 2 dwg, 1 tbl, 3 ex