METHOD OF PRODUCING ROAD BITUMEN Russian patent published in 2024 - IPC C10C3/04 

FIELD: oil refining.

SUBSTANCE: invention relates to a method of producing road bitumen, which includes vacuum distillation of fuel oil to obtain a weighted tar, a black vacuum fraction and a heavy vacuum gas oil, mixing them at a certain ratio with subsequent oxidation in a column with air oxygen to obtain a product depending on the grade of commercial bitumen. Vacuum distillation of fuel oil is carried out to obtain weighted tar boiling within 597 °C is temperature of the end of boiling, black vacuum fraction boiling in range of 486–620 °C, heavy vacuum gas oil boiling within 571–590 °C, they are mixed in weight ratio of weighted tar : black vacuum fraction : heavy vacuum gas oil (2.0–10.0):(85.0–96.0):(2.0–5.0) or in weight ratio black vacuum fraction : heavy vacuum gas oil (95.0–99.9):(0.1–5.0) and their oxidation with one flow at temperature of 241–275 °C and air flow rate of 1,000–1,850 m³/h.

EFFECT: increased depth of fuel oil processing, wider raw material base for production of road bitumen, reduced air consumption for oxidation, increased environmental safety of production.

1 cl, 2 tbl