METHOD FOR PRODUCING MOTOR FUEL AND SYNTHETIC HYDROCARBONS Russian patent published in 2023 - IPC C10G49/00 

FIELD: hydrocarbon processing.

SUBSTANCE: secondary processes for processing hydrocarbons, namely the processing of gasoline fractions obtained from raw hydrocarbons to convert them into high-octane gasoline and synthetic hydrocarbons. The method for producing motor fuel and synthetic hydrocarbons involves processing the gasoline fraction with a boiling point not higher than 180°C, at a temperature of 360-450°C, a pressure of not more than 3.0 MPa, at which the gasoline fraction after heating, before feeding it to the first reactor, is mixed with hydrogen gas, and the resulting mixture is subjected to catalytic processing in the first reactor, where there is a zeolite-containing catalyst, at the exit of which the products pass the tube space of the evaporator, a recuperative heat exchanger, is cooled and separated in the first high-pressure separator into a gas and unstable liquid phase, then the remaining hydrocarbon gas is separated from the unstable liquid phase in the second low-pressure separator, and the liquid phase in the form of stable motor fuel is shipped as a commercial product, and the gas phase in the form of hydrocarbon gas from the first high-pressure separator is sent for additional desulfurization, converted into synthesis gas, and to maintain the H2/CO ratio equal to 2:1, hydrogen gas is added to it, then the synthesis gas is subjected to catalytic processing in the second reactor at mass flow rates of synthesis gas no more than 2 h^-1 using a cobalt catalyst, after which the synthesis products are divided in the second high-pressure separator into a mixture of synthetic saturated hydrocarbons C36-C55 and unreacted synthesis gas, which is fed back into the second reactor for reprocessing, and synthetic hydrocarbons are cooled in a heat exchanger and fed into a second low-pressure separator to separate liquid hydrocarbons from water, then the mixture of liquid hydrocarbons is sent to a distillation column for separation into synthetic diesel fuel and synthetic gasoline, where an evaporator is used as a heater, then synthetic gasoline is removed from the distillation column as a commercial product, and synthetic diesel fuel is removed from the evaporator shell.

EFFECT: improving the quality of the resulting motor fuel by increasing the octane number to at least 92 points and reducing the sulfur and benzene content, as well as expanding the functionality of the production process to ensure the yield of additional useful products - synthetic hydrocarbon fuels.

1 cl, 2 ex, 1 dwg