METHOD OF PRODUCING LOW-SULPHUR DIESEL FUEL Russian patent published in 2020 - IPC C10G45/08 B01J21/02 B01J21/08 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing low-sulphur diesel fuels. Invention relates to a method for hydrofining of mixed and straight-run diesel fractions with high sulphur content at high pressure and heating into a stream of hydrogen-containing gas in the presence of a heterogeneous catalyst containing the following, wt. %: [Co(H₂O)₂(C₆H₅O₇)]₂[Mo₄O₁₁(C₆H₅O₇)₂] - 11.42–18.9, Co₂[H₂P₂Mo₅O₂₃] - 12.1–22.6 and (NH₄)₄[Mo₄(C₆H₅O₇)₂O₁₁] - 3.25–4.73, carrier is balance, wherein support contains, wt. %: in terms of oxides of non-metals SiO₂ - 0.1–20 and B₂O₃ - 0–10; sodium - not more than 0.03; γ- and χ-Al₂O₃ are balance, wherein ratio of low-temperature oxide forms χ-Al₂O₃ and γ-Al₂O₃ of aluminium in the carrier in wt. % is (0–40):(100–60). Catalyst has specific surface area of 140–180 m²/g, pore volume of 0.35–0.70 cm³/g, average pore diameter of 9–13.5 nm and is particles with cross-section in form of circle, trefoil or quartet with diameter of circumscribed circle of 1.0–1.6 mm and length of up to 20 mm. Prior to hydrotreatment, the catalyst is sulphided to obtain a catalyst which contains, wt. %: 11–14 Mo, 2–4 Co, 0.8–1.5 P, 9.0–11.4 S; carrier is balance; wherein the carrier contains, wt. %: SiO₂ - 0.1–20.0 and/or B₂O₃ - 0–10; Al₂O₃ is the rest.

EFFECT: technical result is production of diesel fuel containing less than 10 ppm sulphur during hydrofining of straight-run and mixed diesel fractions with high content of sulphur.

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