FIELD: chemistry.
SUBSTANCE: invention relates to a hydrodemetallation and hydrosulphurisation catalyst, a catalyst system and a method for hydrotreatment of hydrocarbon material. Described is a catalyst containing at least one group VIB metal, at least two group VIII metals designated main promoter VIII-1 and co-promoter VIII-i, where i ranges from 2 to 5, and at least one carrier consisting of a porous refractory oxide, in which group VIII elements are present in proportions determined by atomic ratio [VIII-l/(VIII-l+…+VIII-i)], said ratio ranging from 0.5 to 0.85 and said catalyst containing a group VIB metal or metals in amount of 2-9 wt % of a group VIB metal trioxide with respect to total weight of the catalyst and total content of group VIII metals ranges from 0.3 to 2 wt % of a group VIII metal oxide with respect to total weight of the catalyst. Described is a catalyst system consisting of at least two catalysts described above, in which the first catalyst contains a group VIB metal or metals in amount of 2-9 wt % of a group VIB metal trioxide with respect to total weight of the catalyst and total content of group VIII metals ranges from 0.3 to 2 wt % of group VIII metal oxides with respect to total weight of the catalyst, and the second catalyst contains a group VIB metal or metals in an amount which is strictly more than 9 wt % and less than 17 wt % of a group VIB metal trixode with respect to total weight of the catalyst and total content of group VIII metals is strictly higher than 2 wt % and less than 5 wt % of group VIII metal oxide with respect to total weight of the catalyst, wherein said first and second catalysts have the same atomic ratio. Described is a method for hydrotreatment of heavy hydrocarbon material, involving at least one hydrodemetallation step and at least one hydrodesulphurisation step using at least one catalyst with atomic ratio which is equal at each of the hydrodemetallation and hydrodesulphurisation steps, in which said catalyst is the catalyst described above.
EFFECT: high catalyst activity and degree of conversion of hydrocarbon material.
15 cl, 8 tbl, 9 ex
