Hydroconversion in an ebullated or hybrid ebullated/entrained bed of a feedstock comprising a plastic fraction

A process for the hydroconversion of a feedstock, comprising:

• (a) conditioning and introducing said feedstock into a first hydroconversion section (20) including at least a first ebullated-bed or hybrid ebullated-entrained hydroconversion reactor comprising a first porous supported hydroconversion catalyst, said feedstock including between 1% and 50% by weight of a plastic fraction and 50% and 99% by weight of a heavy hydrocarbon fraction containing a portion of at least 50% by weight having a boiling point of at least 300° C., and containing sulfur, and nitrogen;
• (b) hydroconverting said feedstock in the presence of hydrogen in said first hydroconversion section (20) to obtain a first hydroconverted effluent (105);
• (c) optionally, separating part or all of said first effluent resulting from (b), to form at least one heavy cut boiling predominantly at a temperature greater than or equal to 350° C.;
• (d) optionally, hydroconverting in a second hydroconversion section including at least a second ebullated bed or hybrid ebullated-entrained bed hydroconversion reactor of part or all of said first effluent resulting from (b) or optionally of said heavy cut resulting from (c), said second hydroconversion reactor comprising a second porous supported catalyst and operating in the presence of hydrogen, to produce a second hydroconverted effluent;
• wherein (b) and optionally (d) are performed at an absolute pressure of between 2 MPa and 38 MPa, at a temperature of between 300° C. and 550° C., at an hourly space velocity relative to the volume of each hydroconversion reactor of between 0.05 h-1 and 10 h-1, and with an amount of hydrogen of between 50 Nm3/m3 and 5000 Nm3/m3, and
• (e) fractionating all or some of said first hydroconverted effluent from (b) or said second hydroconverted effluent from (d), in a fractionation section (30), to produce at least one heavy liquid product (106b) boiling predominantly at a temperature greater than or equal to 350° C., said heavy liquid product containing a residual fraction boiling at a temperature greater than or equal to 540° C.