METHOD OF HYDROTREATING CATALYST REACTIVATION Russian patent published in 2020 - IPC B01J38/62 B01J38/12 B01J38/02 B01J23/883 

FIELD: technological processes.

SUBSTANCE: disclosed is a method for reactivation of a hydrotreating catalyst, through which spent catalyst is impregnated with a solution of citric and orthophosphoric acids in a mixture of water and butyl diglycol, having concentrations of butyl diglycol 10–20 vol%, after oxidative regeneration, citric acid 0.42–1.09 mol/l, orthophosphoric acid 0.17–0.54 mol/l, then subjected to thermal treatment at temperature of 60–90 °C for 20–60 minutes, then dried in air at 100–220 °C for 2–6 hours, obtaining a catalyst having pore volume of 0.3–0.55 ml/g, specific surface area of 120–180 m²/g, average pore diameter of 7–12 nm and containing, wt.%: Ni(C₆H₆O₇) – 8.8–15.6; H₄[Mo₄(C₆H₅O₇)₂O₁₁] – 3.2–8.0; H₇[PNiMo₁₁O₄₀] – 5.8–11.6; H₃[Ni(OH)₆Mo₆O₁₈] – 3.7–7.1; H₆[P₂Mo₅O₂₃] – 3.0–7.4; carrier – balance; wherein carrier comprises wt.%: SO₄^2- – 0.5–2.5; PO₄^3- – 2.5–5.5; γ-Al₂O₃ – balance; which corresponds to content in sulphided catalysts, wt.%: Mo – 10.0–16.0; Ni – 2.5–4.5; P – 1.2–2.4; S – 6.7–10.8; γ-Al₂O₃ – balance.

EFFECT: efficient method of reactivation of hydrofining catalyst.

3 cl, 2 tbl, 4 ex