METHOD FOR PRODUCTION OF BASE OF LOW-SOLIDIFYING ARCTIC OILS Russian patent published in 2022 - IPC C10G65/14 C10M101/02 

FIELD: oil refining; petrochemistry.

SUBSTANCE: invention relates to a method for the production of a base of low-solidifying Arctic oils, in which distillate boiling off at a temperature of up to 460°C, obtained by vacuum distillation of straight-run fuel oil from atmospheric distillation of oil, is subjected to catalytic hydrocracking at a temperature of 350-420°C and pressure of 23.0-32.0 MPa, followed by dispersal of the resulting hydrogenate, and obtainment of a heavy residue boiling off at temperature above 280°C and further directed to catalytic dewaxing and hydro-finishing, followed by stabilization of the resulting product to ensure the required flash point. In this case, before catalytic dewaxing, a heavy residue with an increased content of naphthenic hydrocarbons is introduced into the heavy residue of hydrocracking, obtained by deep hydrogenation at a temperature of 325-420°C and pressure of 20.0-31.0 MPa on a nickel-tungsten-sulfide catalyst with addition of aluminum oxide or on a catalyst containing hydrogenating components – nickel, molybdenum in an oxide form, mixtures of weighted medium distillate fractions of primary and secondary oil refining processes, boiling off in the range from 155 to 455°C, followed by hydrogenation of hydrogenate, and release of the heavy residue from hydrogenate on a rectification unit, boiling off at a temperature above 270°C, which allows for obtainment of a base for low-solidifying oils with a solidification temperature below minus 70°C, kinematic viscosity at minus 30°C of no more than 800 mm²/s and at minus 40°C of no more than 2500 mm²/s, content of aromatic hydrocarbons of no more than 3% by wt. and sulfur of not more than 0.001% by wt.

EFFECT: production of a base of low-solidifying Arctic oils, having required improved low-temperature, viscosity, and environmental quality indicators allowing it to be used for the production of commercial low-solidifying oils used in harsh natural and weather conditions of the Arctic and the Far North.

1 cl, 2 dwg, 12 tbl, 4 ex