METHOD FOR USE OF HYDRODEMETALLIZATION CATALYST DURING HYDROGENATION PROCESSING OF OIL STOCK Russian patent published in 2020 - IPC C10G45/08 B01J21/04 B01J23/882 B01J23/883 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of using a hydrodemetallisation catalyst in a hydrogenation treatment of petroleum feedstock containing metals, at elevated temperature and pressure in the presence of a catalyst package in a sulphide form, where the catalyst stack consists of 50–85 vol. % of main layer including one to two hydroprocessing catalysts, which are catalysts containing Al, Ni and/or Co, Mo and/or W, and 15–50 vol. % of protective layer arranged above them, 15–40 vol. % which is an inert material for removing mechanical impurities - layer A, having internal porosity of not less than 65 %, and 60–85 vol. % - hydrodemetallisation catalyst - layer B, wherein a petroleum fractions hydrodemetallisation catalyst is used, having a specific surface area of not less than 200 m²/g, specific pore volume of not less than 0.6 cm³, at least 19 % of which are macropores with diameter of 0.1 to 2.0 mcm, which consists of a support obtained using an annealing template of macropores used as a paraffin emulsion, from pseudo-boehmite or boehmite powders, spent hydrofining catalysts and catalytic cracking in amount of 20–45 wt. % and up to 2 wt. % respectively, subjected to regeneration, and active metals in form of citrates and oxides of nickel, cobalt and molybdenum, total content of which in terms of oxides in calcined catalyst is in wt. %: MoO₃ - 5.0–9.0, CoO - 0.5–1.1, NiO - 0.5–1.1.

EFFECT: technical result is the development of a method of using a hydrodemetallisation catalyst in the process of hydrogenation treatment of petroleum feedstock with a boiling point above 140 °C in order to obtain a hydroformed product with residual content of nickel not more than 1 mg/kg, vanadium not more than 1 mg/kg.

3 cl, 3 ex