PETROLEUM FRACTION CONVERSION PROCESS INCLUDING A HYDROCONVERSION STAGE IN A BUBBLING BED, A SEPARATION STAGE, A HYDRODESULFURATION STAGE AND A CRACKING STAGE

摘要

process for conversion of a hydrocarbon fraction comprising a step (a) treatment of a hydrocarbon charge in the presence of hydrogen in a three-phase reactor (1).catalyst containing at least one hydroconversion bubbling bed.a step (b), in which at least a portion of the effluent from the step (a) is sent to a separation zone (2) from which a portion is usually with the f1a portion of the gas, gasoline and diesel) content in the effluent of the step (a).and f2 usually containing mainly compounds having boiling points higher than those of diesel atemosphu00e9rique.a step (c) of light of at least a portion of the f1 in at least one reactor (4) containing at least a hydroprocessing catalyst fixed bed under conditions permettanto obtain an effluent with a low sulphur content, and a step (d), in which at least a part of the f2 is sent to a catalytic section (6).