Process for converting a heavy hydrocarbon feedstock with initial boiling point of at least 300 C. comprising: a) hydroconverting at least part of said feedstock; b) separating the effluent from stage a) to obtain light and heavy liquid fractions; c) at least two stages of deasphalting in series at least part of the heavy liquid fraction originating from stage b), allowing to separate at least one fraction of asphalt, at least one fraction of heavy deasphalted oil (heavy DAO) and at least one fraction of light deasphalted oil (light DAO), at least one deasphalting stage being carried out using a mixture of at least one polar solvent and at least one apolar solvent, said deasphalting stages being under subcritical conditions of the mixture of solvents; d) recycling at least part of said heavy deasphalted oil cut from stage c) upstream of hydroconverting a) and/or of the inlet of separating b).

Process for converting a heavy hydrocarbon feedstock with initial boiling point of at least 300 C. comprising: a) hydroconverting at least part of said feedstock; b) separating the effluent from stage a) to obtain light and heavy liquid fractions; c) at least two stages of deasphalting in series at least part of the heavy liquid fraction originating from stage b), allowing to separate at least one fraction of asphalt, at least one fraction of heavy deasphalted oil (heavy DAO) and at least one fraction of light deasphalted oil (light DAO), at least one deasphalting stage being carried out using a mixture of at least one polar solvent and at least one apolar solvent, said deasphalting stages being under subcritical conditions of the mixture of solvents; d) recycling at least part of said heavy deasphalted oil cut from stage c) upstream of hydroconverting a) and/or of the inlet of separating b).

The invention relates to a method for processing a pyrolysis oil from plastics and/or solid recovered fuels, comprising: a) optional selective hydrogenation of the feedstock; b) hydroconversion in an ebullated bed, entrained bed and/or moving bed, in order to obtain a hydroconverted effluent; c) separation of the effluent from step b) in the presence of an aqueous stream to obtain a gaseous effluent, an aqueous effluent and a hydrocarbon liquid effluent; d) optional fractionation to obtain at least one gaseous stream and a fraction having a boiling point of less than or equal to 150 C. and a fraction having a boiling point of greater than 150 C.

The invention relates to a method for processing a pyrolysis oil from plastics and/or solid recovered fuels, comprising: a) optional selective hydrogenation of the feedstock; b) hydroconversion in an ebullated bed, entrained bed and/or moving bed, in order to obtain a hydroconverted effluent; c) separation of the effluent from step b) in the presence of an aqueous stream to obtain a gaseous effluent, an aqueous effluent and a hydrocarbon liquid effluent; d) optional fractionation to obtain at least one gaseous stream and a fraction having a boiling point of less than or equal to 150 C. and a fraction having a boiling point of greater than 150 C.

The invention relates to a gas-liquid separation device, notably for being installed in the recycle zone of three-phase fluidized reactors. The gas-liquid separation device comprises several separation elements each having an inlet pipe (70) and a succession of at least two bends (71, 72), a first bend (71) situated in the plane (zy), the axis of the first bend (71) forming an angle of orientation with respect to the vertical z-axis of between 45 and 315, and a second bend (72) forming a second angle of orientation p with the first bend (71) of between 1 and 135. The two first successive bends (71, 72) are separated by a distance D1 of between D/2 and 4D, D being the diameter of the inlet pipe (70). Each separation element comprises a liquid-guiding device (73) positioned at the outlet end of the last bend (72), and with an open section.

The invention relates to a gas-liquid separation device, notably for being installed in the recycle zone of three-phase fluidized reactors. The gas-liquid separation device comprises several separation elements each having an inlet pipe (70) and a succession of at least two bends (71, 72), a first bend (71) situated in the plane (zy), the axis of the first bend (71) forming an angle of orientation with respect to the vertical z-axis of between 45 and 315, and a second bend (72) forming a second angle of orientation p with the first bend (71) of between 1 and 135. The two first successive bends (71, 72) are separated by a distance D1 of between D/2 and 4D, D being the diameter of the inlet pipe (70). Each separation element comprises a liquid-guiding device (73) positioned at the outlet end of the last bend (72), and with an open section.