METHOD FOR CONVERSION OF HEAVY HYDROCARBON CHARGES, INCLUDING STAGES OF HYDROCONVERSION IN ENTRAINED AND RECIRCULATED LAYER OF DE-ASPHALTED OIL Russian patent published in 2023 - IPC C10G45/08 C10G65/04 

FIELD: oil industry.

SUBSTANCE: invention concerns a method for conversion of heavy hydrocarbon charge containing a fraction of at least 50%, having a boiling temperature of at least 300°C, and containing sulfur, carbon by Conradson, metals and nitrogen, including at least two sequential stages of hydroconversion on an entrained layer, which can be divided by an intermediate separation stage, and at least one stage of de-asphalting of a heavy fraction of a waste flow, obtained in the result of hydroconversion, with recirculation of the entire fraction of de-asphalted oil (hereinafter – DAO) to the last additional hydroconversion stage and/or to the intermediate separation stage. DAO is subjected to recirculation, when it leaves a de-asphalting installation, or when it is subjected to a fractionating stage to obtain a heavy fraction of DAO, which, thus, constitute recirculated DAO.

EFFECT: increase in both a conversion degree and stability of liquid waste flows.

18 cl, 3 ex, 24 tbl, 5 dwg