METHOD OF OBTAINING HIGH-OCTANE BASE GASOLINE Russian patent published in 2014 - IPC C10G35/04 C10G35/95 C10G65/14 

FIELD: chemistry.

SUBSTANCE: invention deals with two-stage method of obtaining high-octane base gasoline with application of liquid and gaseous hydrocarbon raw material in presence of catalyst, and circulation of nonconverted raw material and hydrocarbon gases. As liquid hydrocarbon raw material used is oil or gas condensate, or their mixture; as gaseous hydrocarbon raw material used is C₁-C₄ fraction and/or C₃-C₄ fraction and circulating hydrocarbon gases; liquid hydrocarbon raw material is subjected to fractioning in fractionation column with removal of straight-run fractions with limits of evaporation within the temperature interval C₅-75°C, benzene fraction with limits of evaporation within the temperature interval 75-85°C, fraction 85-(160-220)°C and circulating hydrocarbon gases; fraction with limits of evaporation within temperature interval C₅-75°C and 85-(160-220)°C are supplied to first stage of contact with zeolite-containing catalyst or system of catalysts, promoted with metals of I-VIII group of Periodic table, benzene fraction with limits of evaporation within the temperature interval 75-85°C is removed from fractionation products. Gaseous hydrocarbon raw material is supplied to second stage of contact; it contacts with zeolite-containing catalyst or system of catalysts, promoted with metals of I-VIII group of Periodic table, and contact in first and second stages takes place with the course of main reactions - isomerisation, aromatisation and hydration, products of contact of first and second stages together undergo stabilisation and fractionation with separation of target product - high-octane base gasoline, evaporating within temperature interval C₅-(160-220°C), residue higher than (160-220°C), non-converted raw material, which circulates in first stage raw material, and hydrocarbon gases, which circulate in second stage raw material.

EFFECT: obtaining high-octane base gasoline with improved ecological characteristics.

6 cl, 1 dwg, 2 tbl, 3 ex