COMPOSITION AND METHOD OF PRODUCING A CATALYST FOR HYDROGENATING OF DIOLEFINS Russian patent published in 2020 - IPC B01J21/04 B01J23/75 B01J23/755 B01J23/28 B01J35/04 B01J32/00 B01J37/08 C10G45/04 C01G45/06 C10G45/08 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil refining industry, in particular to catalysts for hydro-regeneration of petroleum fractions, namely, to catalysts of protective layer for hydrogenation of diolefins and to methods for their preparation. Disclosed is a catalyst for hydrogenating diolefins for use in a protective layer in a process of hydroforming petroleum distillates, consisting of a modified carrier prepared based on a highly porous cellular material with a mesh content of 10–30 mesh and a grafted layer of gamma-aluminum oxide, as well as bimetallic complex compounds of VIII and VI groups metals deposited on the support. Catalyst is characterized by that highly porous cellular material has open porosity of not less than 50 %, as bimetallic complex compounds of metals of VIII and VI groups catalyst includes compounds of nickel or cobalt and molybdenum, and content of components calcined at temperature 550 °C catalyst is, wt%: high-porous cellular material – 73.0–88.1; γ-Al₂O₃ in the form of grafted layer – 8.0–22.2; nickel and / or cobalt oxide – not less than 0.5; molybdenum oxide – not less than 2.0, wherein catalyst in activated state has specific surface of 12–25 m²/g, effective pore diameter of 3.0–6.7 nm, mechanical compression strength of not less than 200H.

EFFECT: developed catalyst for hydrogenation of diolefins, having adsorption and catalysis functions, under conditions of hydrogenation refinement of oil fractions, depth of removal of diolefins of 90 % and more, which enables to reduce content of coke on catalyst, reducing pressure drop across the reactor and thereby increasing the service life of the main hydroforming catalyst prior to regeneration to not less than three years, and the method of preparing said catalyst enables to obtain a catalyst with optimum diolefin hydrogenation characteristics when the raw material base is expanded.

6 cl, 3 tbl