METHOD FOR DELAYED COKING OF OIL RESIDUES Russian patent published in 2023 - IPC C10B55/00 C10G7/00 

FIELD: coke production.

SUBSTANCE: invention is related to technologies for production of petroleum cokes and coke additives with a simultaneous increase in the yield of light petroleum products and can be used in the oil refining industry. The method includes supplying secondary raw materials from the evaporation column through a reaction-heating furnace to the coking chamber, accumulating coke, separating distillate coking products in a distillation column into vapor products - water vapor and coking naphtha, light gas oil, heavy gas oil and heavy bottoms residue. Moreover, heavy distillation residue mixed with light gas oil in a ratio of 1:2 to 1:8 parts is used as a recirculate in the formation of secondary raw materials.

EFFECT: increase of selection of light oil products with a simultaneous increase in the selection of gasoline and diesel fractions and increase of stability of the plant as a whole by increasing the uniformity of the resulting coke due to smoothing its quality fluctuations throughout the volume of the coking chamber.

4 cl, 2 dwg, 2 tbl, 4 ex