ASPHALTENE PITCH CONVERSION DURING HYDROCRACKING OF RESIDUE WITH FLUIDIZED BED Russian patent published in 2017 - IPC C10G47/00 C10G1/08 C10G47/26 C10G49/22 C10G65/10 C10G65/12 C10G67/02 B01J19/24 

FIELD: chemistry.

SUBSTANCE: method comprising the steps of heavy oil raw material hydrocracking in the hydrocracking reaction system including one or more steps of hydrocracking reactions with a hydrocracking reactor containing a fluidized bed; effluent and spent or partially spent catalyst are recovered from the hydrocracker reactor with a fluidized bed; the effluent is fractionated to produce two or more hydrocarbon fractions; solvent deasphalting of at least one of two or more hydrocarbon fractions is carried out to produce a deasphalted oil fraction and pitch; pitch, hydrogen, and partially spent catalyst are fed to the pitch hydrocracking reactor with a fluidized bed; pitch, hydrogen and catalyst are contacted in the pitch hydrocracking reactor with a fluidized bed under the reaction conditions - temperature and pressure, sufficient to convert at least a part of the pitch to distillate hydrocarbons; distillate hydrocarbons are separated from the catalyst. For some versions, the process can include selection of the reaction conditions in the pitch hydrocracking reactor with a fluidized bed to be at or below the level where residue formation would otherwise become excessive and prevent work continuity.

EFFECT: higher total residue conversion with decreased rate of catalyst injection.

31 cl, 3 dwg