DEEP CONVERSION PROCESS FOR RESIDUE MAXIMISING THE EFFICIENCY OF DIESEL

摘要

The invention relates to a method for deep conversion of a heavy hydrocarbon feedstock comprising the following steps: a) a first boiling bed hydroconversion step, b) a step of separating at least a portion of the hydroconverted liquid effluent from step a), c) a step of hydrocracking at least part of the vacuum gas oil fraction from step b), d) a fractionation step of at least a portion of the effluent from step c), e) a step of recycling at least a portion of the unconverted vacuum gas oil fraction from step d) in said first hydroconversion step a).