| abstract |
The invention concerns a mesoporous and macroporous hydroconversion catalyst comprising: - a predominantly calcined aluminium oxide matrix; - a hydro-dehydrogenating active phase comprising at least one metal from group VIB of the periodic table, optionally at least one metal from group VIII of the periodic table, optionally phosphorus, said active phase being at least partially comulled in said predominantly calcined aluminium oxide matrix, said catalyst having a specific surface area Sbet greater than 100 m2/g, a mesoporous volume median diameter of between 12 and 25 nm, terminals included, a macroporous volume median diameter of between 50 and 250 nm, terminals included, a mesoporous volume as measured by mercury intrusion porosimetry, greater than or equal to 0.65 ml/g and a total porous volume measured by mercury porosimetry greater than or equal to 0.75 ml/g. The invention also concerns a method for preparing a catalyst suitable for the hydroconversion/hydrotreatment of residuum by comulling the active phase with a specific alumina. The invention finally concerns the use of the catalyst in hydrotreatment methods, in particular the hydrotreatment of heavy feedstocks. |