Process for converting heavy petroleum fractions that comprise a distillation stage, ebullated-bed hydroconversion stages of the vacuum distillate, and a vacuum residue and a catalytic cracking stage

A process for converting a hydrocarbon fraction that contains basically the atmospheric residue from the direct distillation of a crude, comprising the following stages:

• a) The hydrocarbon fraction is sent to a vacuum distillation zone from which a vacuum distillate (DSV) and a vacuum residue (RSV) are recovered,
• b) At least a portion of the vacuum distillate that is obtained in stage a) is treated in at least one hydrotreatment section, comprising at least one triphase reactor that contains at least one ebullated-bed hydrotreatment catalyst under conditions that obtain a liquid feedstock with low contents of Conradson carbon, metals, and sulfur,
• c) At least a portion of the vacuum residue that is obtained in stage a) is treated in the presence of hydrogen in at least one hydroconversion section, whereby said section comprises at least one triphase reactor that contains at least one ebullated-bed hydroconversion catalyst under conditions that obtain a liquid feedstock with low contents of Conradson carbon, metals, and sulfur,
• d) At least a portion of the hydrotreated liquid effluent that is obtained from stage b) is sent to an atmospheric distillation zone from which an atmospheric distillate and an atmospheric residue are recovered,
• e) At least a portion of the hydroconverted liquid effluent that is obtained from stage c) is sent to an atmospheric distillation zone from which an atmospheric distillate and an atmospheric residue are recovered.