IMPROVED METHOD OF CONVERTING HEAVY HYDROCARBON FEEDSTOCK Russian patent published in 2019 - IPC C10G65/00 C10G65/12 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of converting a heavy hydrocarbon feedstock, involving the following steps: a) a step for hydroconversion of heavy hydrocarbon material in the presence of hydrogen in at least one or more three-phase reactors, installed in series or in parallel, containing at least one hydroconversion catalyst, wherein step a) of hydroconversion is carried out at absolute pressure of 2 to 35 MPa, temperature of 300 to 550 °C and with amount of hydrogen mixed with raw material from 50 to 5000 normal cubic meters (Nm³) per cubic meter (m³) of raw material to obtain a liquid stream with reduced content of coke residue according to Conradson, metals, sulphur and nitrogen, b) one or more optional steps of separating the stream coming from step a), allowing to obtain at least one light liquid fraction boiling at temperature below 350 °C, and at least one heavy liquid fraction boiling at temperature higher than 350 °C, c) stage of hydroconversion of liquid flow leaving hydroconversion stage a), in case, when b) separation is not applied, or stage of hydroconversion of heavy liquid fraction coming from separation stage b), when said stage b) is applied, in the presence of hydrogen in at least one or more three-phase reactors, installed in series or in parallel, containing at least one hydroconversion catalyst, wherein step (c) of the hydroconversion is carried out at an absolute pressure of 2 to 38 MPa, temperature of 300 to 550 °C and with amount of hydrogen from 50 to 5000 normal cubic meters (Nm³) per cubic meter (m³) of liquid material under standard conditions by temperature and pressure, wherein the hydroconversion catalyst at step a) and/or c) comprises an alumina substrate, wherein the catalyst at step a) and/or c) is used in the form of extrudates or balls, and the total volume hourly rate used in said method ranges from 0.05 to 0.09 h^-1.

EFFECT: disclosed method increases stability of effluents at a given level of conversion of heavy fractions.

8 cl, 2 dwg, 9 tbl, 2 ex