METHOD FOR HYDROCONVERSION OF HEAVY CARBON-CONTAINING RAW MATERIAL Russian patent published in 2025 - IPC C10G49/04 B01J27/19 

FIELD: petrochemistry.

SUBSTANCE: invention relates to the field of petrochemistry and, more specifically, to the process of hydroconversion or hydrocracking of heavy high-molecular carbon-containing raw material. Disclosed is a method for hydroconversion of heavy high-sulphur carbon-containing raw material, comprising obtaining an aqueous solution of a precursor of a molybdenum-containing catalyst, compound of obtained precursor with part of raw material taken in amount of 10 wt. %. of the total amount of the processed raw material, and dispersion of the obtained mixture until a stable emulsion is formed, mixing the obtained emulsion with the remaining oil stock, heating the obtained mixture, feeding it into a reactor for hydroconversion in an ascending flow in a mixture with a hydrogen-containing gas at temperature of 400-450 °C and pressure from 7 to 14.5 MPa, extraction from reaction products of hydrogen-containing gas, light distillate fractions with their output and heavy residue with boiling point higher than 520 °C, returned for hydroconversion in form of molybdenum-containing recycling, and the temperature in the reactor is controlled by feeding hot circulating hydrogen-containing gas into the flow after mixing the pre-heated raw material with the emulsion, wherein the aqueous solution of the precursor of the molybdenum-containing catalyst is obtained with molybdenum concentration of 3.0-4.9 wt. %; mixing the obtained aqueous solution of the precursor with part of the oil stock to obtain an inverse emulsion is carried out at temperature of 60-95 °C; reverse emulsion is mixed immediately before the hydroconversion reactor with the remaining raw material, preheated so that temperature at the point of mixing of the inverse emulsion and the oil raw material reaches 250-350 °C; hydroconversion is carried out in two series-connected and continuously operating reactors; products of hydroconversion from the first reactor are degassed with output of light boiling out to 300 °C distillate fractions and residue boiling above 300 °C, which is sent to the second reactor, products of hydroconversion from the second reactor are degassed and mixed with light distillate fractions extracted from products of hydroconversion of the first reactor, after which they are fractionated with extraction and withdrawal of fractions: IBP – 180, 180-350, 350-520 °C and higher 520 °C.

EFFECT: reduction of catalyst particle size to 780-930 nm, reduction of coke output to 0_89-0_95 %; increased output of distillate fractions, boiling to 520°C, up to 91_2-93 %.

6 cl, 2 dwg, 3 tbl, 25 ex