Patent ID: 6017441
Filing Date: 2000-01-25
Classification: C10G

Abstract:
A process for converting a heavy hydrocarbon fraction with a Conradson carbon of at least 10, a metal content of at least 50 ppm, a C.sub.7 asphaltene content of at least 1%, and a sulphur content of at least 0.5%, characterized in that it comprises the following steps:a) treating the hydrocarbon feed in a hydroconversion section in the presence of hydrogen, the section comprising at least one three-phase reactor containing at least one ebullated bed hydroconversion catalyst operating in liquid and gas riser mode, said reactor comprising at least one means for removing catalyst from said reactor and at least one means for adding fresh catalyst to said reactor, under conditions which will produce a liquid effluent with a reduced Conradson carbon, metal content and sulphur content;b) sending at least a portion of the hydroconverted liquid effluent from step a) to an atmospheric distillation zone, from which an atmospheric distillate and an atmospheric residue are recovered;c) sending at least a portion of the atmospheric residue from step b) to a vacuum distillation zone from which a vacuum distillate and a vacuum residue are recovered;d) sending at least a portion of the vacuum residue from step c) to a deasphalting section in which it is treated in an extraction section using a solvent under conditions such that a deasphalted hydrocarbon cut and residual asphalt are recovered;e) sending at least a portion of the deasphalted hydrocarbon cut from step d) to a hydrotreatment section in which it is hydrotreated in the presence of hydrogen under conditions such that an effluent with a reduced Conradson carbon, metal content and sulphur content is produced, and after separation, a gas fraction, a fuel fraction and a heavier liquid fraction of the hydrotreated feed are recovered, said section comprising at least one three-phase reactor containing at least one ebullated bed hydrotreatment catalyst, operating in liquid and gas riser mode, said reactor comprising at least one means for removing catalyst from the reactor and at least one means for adding fresh catalyst to the reactor, in which at least a portion of the heavier liquid fraction of the hydrotreated feed from step e) is sent to a catalytic cracking section (step f) in which it is treated under conditions such that a gaseous fraction, a gasoline fraction, a gas oil fraction and a slurry fraction are produced.