Process for the intense conversion of residues, maximizing the gas oil yield

A process for the intense conversion of a heavy hydrocarbon feed, comprising the following steps:

• a) a first step for ebullated bed hydroconversion of the feed in the presence of hydrogen, comprising at least one three-phase reactor containing at least one ebullated bed hydroconversion catalyst;
• b) a step for separating at least a portion of a hydroconverted liquid effluent obtained from step a) into a fraction comprising a gasoline cut and a gas oil cut, a vacuum gas oil fraction and an unconverted residual fraction;
• c) a step for hydrocracking at least a portion of the vacuum gas oil fraction obtained from step b) in a reactor comprising at least one fixed bed hydrocracking catalyst;
• d) a step for fractionating at least a portion of an effluent obtained from step c) into a gasoline fraction, a gas oil fraction and an unconverted vacuum gas oil fraction;
• e) a step for recycling at least a portion of the unconverted vacuum gas oil fraction obtained from step d) to said first hydroconversion step a)
• wherein at least a portion of the unconverted residual fraction obtained from step b) is sent to a deasphalting section where it is treated in an extraction step using a solvent under conditions for obtaining a deasphalted hydrocarbon cut and pitch;
• wherein said deasphalted hydrocarbon cut is sent to a second hydroconversion step in the presence of hydrogen and at least one ebullated bed hydroconversion catalyst,
• wherein the effluent obtained from the second hydroconversion step undergoes a separation step f) in order to produce at least one fraction comprising a gasoline cut and a gas oil cut, a vacuum gas oil fraction and a unconverted residual fraction, and
• wherein the vacuum gas oil fraction obtained from the separation step f) is sent to the hydrocracking step c) as a mixture with the vacuum gas oil fraction obtained from step b) and optionally with a straight run vacuum gas oil fraction.