METHOD FOR PRODUCING DIESEL FUEL WITH LOW-TEMPERATURE PROPERTIES Russian patent published in 2023 - IPC C10G65/00 C10G65/02 C10G65/12 C10L1/08 C10G45/02 

FIELD: oil refining.

SUBSTANCE: method for producing diesel fuel with low-temperature properties is proposed, including the stage of catalytic hydrotreatment (hereinafter referred to as CH) of hydrocarbon feedstock boiling in the range of boiling points of the diesel fraction, at elevated temperature and pressure in the presence of hydrogen to obtain hydrotreated raw hydrocarbons, the stage of catalytic isodewaxing of hydrotreated raw hydrocarbons at increased temperature and pressure in the presence of hydrogen to obtain isodewaxing catalysate and the stage of fractionation of isodewaxing catalysate to obtain commercial diesel fuel, while the reaction gas-liquid mixture leaving the CH reactor at the catalytic CH stage is subjected to separation at high pressure into a gas phase consisting of hydrogen, ammonia, hydrogen sulphide and light hydrocarbon impurities, and liquid CH catalyst in the stripping column with the supply of a stripping agent, where part of the liquid CH catalyst is pumped out by pumps from the stripping columns, is cooled and flows to the top of the stripping column as a spray, the rest of the liquid CH catalysate enters the stage of catalytic isodewaxing as hydrotreated raw hydrocarbons, and hydrogen-containing gas (hereinafter referred to as HCG) with an admixture of light hydrocarbons obtained at the stage of catalytic isodewaxing by separating the reaction products, enters the stripping column as a stripping agent.

EFFECT: obtaining diesel fuel with low-temperature properties, when combining the processes of GO and isodeparaffinization with ensuring a reduction in energy costs for implementation.

4 cl, 1 dwg, 2 tbl, 1 ex