METHOD FOR REGENERATING DEACTIVATED CATALYST FOR HYDRO-TREATING Russian patent published in 2018 - IPC B01J38/62 B01J38/12 B01J38/02 B01J23/94 

FIELD: technological processes.

SUBSTANCE: invention relates to a method for regenerating deactivated catalysts for hydrotreating diesel fuel. Described is a method for regenerating a deactivated hydrotreating catalyst, in which the deactivated catalyst is calcined at a temperature of not more than 650 °C. Next, the calcined catalyst is contacted with a reactivating solution containing 0.55–2.7 mol/l of citric acid in an aqueous solution containing 10–20 wt. % butyldiglycol and 10–20 wt. % diethylene glycol. Said catalyst discharged from the impregnator in a continuous stream is fed to the dryer. As a result a catalyst is obtained having a pore volume of 0.3–0.8 ml/g, specific surface area of 150–280 m²/g, the average pore diameter of 6–15 nm, containing, wt. %: Co(C₆H₆O₇) – 6.3–13.0; H₄[Mo₄(C₆H₅O₇)₂O₁₁] – 8.6–11.2; H₃[Co(OH)₆Mo₆O₁₈] – 6.2–7.7; H₆[P₂Mo₅O₂₃] – 4.0–10.2; SO₄^2- – 0.7–2.6; PO₄^3- – 0.5–4.4; carrier – the rest.

EFFECT: technical result consists in carrying out hydrotreatment of diesel fuel in the presence of a catalyst of the claimed chemical composition, to obtain diesel fuel containing not more than 10 ppm of sulfur at low starting temperatures of the process, which predicts a long catalyst lifetime.

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