METHOD FOR PROCESSING UNCONVERTED RESIDUES OF OIL REFINING PROCESSES TO PRODUCE DIESEL FUEL Russian patent published in 2022 - IPC C10G69/02 

FIELD: oil refining industry.

SUBSTANCE: invention relates to the field of oil refining. The invention relates to a method for processing unconverted residues of oil refining processes, including delayed coking to obtain coking distillates: light coker gas oil and coking naphtha, mixing them with distillates of other processes, joint hydrotreating and subsequent rectification, during which gasoline is isolated with a temperature from the beginning of boiling to 160°C, winter diesel fraction with a boiling point from 140 to 300°C, summer diesel fraction with a boiling point from 240 to 370°C. As raw materials for the hydrotreating process, light coker gas oil with a boiling point of 95% by volume 365-375°C is used, and light catalytic cracking gas oil, light viscosity breaking gas oil and light vacuum gas oil are used as distillates of other processes with the following ratio of components in the hydrotreating process, wt. %: light coker gas oil 50-80; coking naphtha 5-20; light catalytic cracking gas oil 5-30; light viscosity breaking gas oil 5-20; light vacuum gas oil 5-20.

EFFECT: increase in the yield of the summer diesel fraction with a boiling point from 240 to 370°C while maintaining the amount of output of the winter diesel fraction when using low-quality distillates of other processes with a high sulfur content.

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