METHOD OF PREPARING A PROTECTIVE LAYER CATALYST FOR A HYDROFINING PROCESS OF A SILICON-CONTAINING HYDROCARBON RAW Russian patent published in 2019 - IPC B01J37/02 B01J37/08 B01J23/883 B01J31/22 B01J31/16 B01J31/04 C10G45/08 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to methods of preparing catalysts of protective layer arranged in front of main hydrotreating catalyst of hydrocarbon raw material to prevent its poisoning with silicon compounds contained in hydrofining feed. Described is a method of preparing a catalyst which contains molybdenum and nickel in the form of nickel aluminum-getero-polymolybdate with Andersen structure NiH[Al(OH)₆Mo₆O₁₈] – 5.5–7.7 wt% and in the form of nickel molybdate NiMoO₄ – 4.6–6.4 wt%; carrier – balance; wherein the support contains, wt%: aluminum borate Al₃BO₆ with norbergite structure – 5.0–25.0; γ-Al₂O₃ – balance. Method involves impregnating a support containing the following in wt%: aluminum borate Al₃BO₆ with norbergite structure – 5.0–25.0; γ-Al₂O₃ – balance, aqueous solution of bimetallic complex compound [Ni(H₂O)₂]₂[Mo₄O₁₁(C₆H₅O₇)₂], followed by drying, tempering, impregnation with water and drying. Obtained catalyst has specific surface area of 245–275 m²/g, pore volume 0.50–0.55 cm³/g, average pore diameter of 80–85 Å, represents granules in cross-section in form of trefoil with size from top to middle of base 2.5±0.2 mm and length up to 10 mm. Described also is a method of producing a sulphided catalyst containing wt%: Mo – 5.0–7.0; Ni – 1.7–2.3; S – 3.4–4.7; carrier – balance; wherein the support contains, wt%: aluminum borate Al₃BO₆ with norbergite structure – 5.0–25.0; γ-Al₂O₃ – balance.

EFFECT: technical result consists in obtaining a catalyst having high capacity for silicon dioxide and high resistance to decontamination under conditions of hydrofining of hydrocarbon material.

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