CATALYST FOR DEEP HYDROFINING OIL FRACTIONS AND METHOD OF PREPARATION THEREOF Russian patent published in 2021 - IPC B01J23/883 B01J23/888 B01J21/04 B01J21/12 B01J27/47 B01J31/22 B01J37/02 C10G45/08 

FIELD: chemistry.

SUBSTANCE: invention relates to production of hydrotreating catalysts. Described is a hydrofining catalyst for petroleum fractions which includes nickel, molybdenum, tungsten and a carrier, characterized in that NiO, MoO₃ and WO₃ are deposited on a calcined support from a co-solution containing mixed heteropoly compounds H₄[SiMo_nW_12-nO₄₀] (n = 1–6), nickel carbonate NiCO₃×H₂O and organic additive, followed by activation of catalyst with mixture of dimethyl disulphide and kerosene fraction at 240 °C for 10 hours and at 340 °C for 10 hours. Content of metals in calcined catalyst is: MoO₃ - 1.0–9.0 wt. %, WO₃ - 13.0–25.0 wt. %, NiO - 3.0–5.0 wt. %; the rest is a porous carrier with carbon content of 0–4 wt. %. Catalyst has specific surface area of not less than 180 m²/g, specific pore volume of not less than 0.5 cm³/g, effective pore diameter of not less than 6.0 nm. Organic additive used is at least one of the following: citric acid C₆H₈O₇, tartaric acid C₄H₆O₆, ethylene glycol C₂H₆O₂.

EFFECT: technical result is obtaining a catalyst characterized by high activity during hydrofining of oil fractions.

4 cl, 2 tbl, 10 ex