PETROL PROCESSING METHOD Russian patent published in 2020 - IPC C10G45/02 C10G65/04 C10G65/16 

FIELD: chemical or physical processes.

SUBSTANCE: present invention relates to a method of treating petrol containing sulfur compounds, olefins and diolefins, involving the following steps: a) fractionation of gasoline into at least: light gasoline fraction LCN; intermediate gasoline fraction MCN containing hydrocarbons and having temperature difference (ΔT), corresponding to 5 % and 95 % of distilled mass, from 20 °C to 60 °C; and a heavy gasoline fraction HHCN containing hydrocarbons; b) desulphurisation only of intermediate gasoline fraction of MCN in presence of hydrodesulphurization catalyst and hydrogen at temperature of 160 °C to 450 °C, pressure 0.5 to 8 MPa, liquid volume velocity from 0.5 to 20 h^-1 and with ratio between hydrogen flow rate expressed in normal m³ per hour and treated raw material consumption, expressed in m³ per hour under standard conditions, from 50 Nm³/m³ to 1000 Nm³/m³ to obtain at least partially desulphated intermediate gasoline fraction MCN; c) fractionating in the fractional column a partially desulphated intermediate gasoline fraction of MCN not subjected to catalytic treatment after step b), in order to extract intermediate gasoline with low content of sulfur and mercaptans from bottom of column and hydrocarbon fraction containing sulfur compounds, including mercaptans; d) desulphurisation of a heavy gasoline fraction of HHCN, alone or in a mixture with the bottom hydrocarbon fraction from step c) in the presence of a hydrodesulphurization catalyst and hydrogen, at temperature of 200 °C to 400 °C, pressure of 0.5 to 8 MPa, liquid volume velocity from 0.5 to 20 h^-1 and with ratio between hydrogen flow rate expressed in normal m³ per hour and treated raw material consumption, expressed in m³ per hour under standard conditions, from 50 Nm³/m³ to 1000 Nm³/m³ to obtain at least partially desulphurised heavy fraction of HHCN.

EFFECT: disclosed is a method of treating gasoline.

14 cl, 5 dwg, 1 ex, 2 tbl