METHOD FOR PREPARATION OF THE CATALYST FOR THE SECOND STAGE OF HYDROCRACKING Russian patent published in 2022 - IPC B01J21/04 B01J23/42 B01J29/12 B01J29/67 B01J37/02 B01J37/08 

FIELD: oil refining industry.

SUBSTANCE: invention relates to a method for preparing an oil refining catalyst, in particular to a method for preparing a bifunctional hydrocracking catalyst that makes it possible to obtain diesel fuel with improved low-temperature characteristics from heavy oil fractions. The catalyst is prepared by impregnation taking into account humidity ratio with an aqueous solution of H₂PtCl₆ with a platinum concentration of 3.75 – 7.06 g/l of a carrier containing, wt. %: one-dimensional medium-porous zeolite ZSM-23 with MTT structure and SiO₂/Al₂O₃ silicate module = 48 – 10,0-20,0, ultra–stable zeolite Y with silicate module SiO₂/Al₂O₃ = 80 - 10.0-15.0, binder: γ-aluminum oxide the rest, with subsequent stages of drying and calcination. As a result, a catalyst is obtained that contains, wt. %: Pt 0.3-0.6, the carrier the rest. At the same time, the carrier contains, wt. %: one-dimensional medium-porous zeolite ZSM-23 with MTT structure and SiO₂/Al₂O₃ silicate module = 48 – 10,0-20,0; ultra-stable zeolite Y with silicate module SiO₂/Al₂O₃ = 80 – 10,0-15,0; binder: γ-aluminum oxide the rest. The catalyst has a specific surface area of at least 330 m²/g, the total pore volume is at least 0.60 cm³/g, while the volume of micropores is at least 0.015 cm³/g.

EFFECT: creation of an improved method for preparing a catalyst for the second stage of hydrocracking with high activity and selectivity in the target reactions of hydrocracking of raw materials, which provides a higher yield of the target diesel fraction, lower turbidity temperatures, higher cetane number.

8 cl, 2 tbl, 5 ex