METHOD FOR SELECTIVE HYDROGENATION OF GASEOUS MIXTURE WITH HIGH CONTENT OF ACETYLENE Russian patent published in 2025 - IPC C07C5/08 C07C5/09 C07C11/24 C07C11/04 B01J23/38 B01J23/70 B01J35/60 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method for selective hydrogenation of a gaseous mixture with high acetylene content. Described is a selective hydrogenation method comprising steps of: a) providing a gaseous mixture containing from 2 to 10 mol.% acetylene, from 50 to 75 mol.% hydrogen and from 18 to 48 mol.% methane, wherein concentration of hydrocarbons C2 different from acetylene in the mixture is not more than 1 mol.%; b) producing a hydrogenation product containing ethylene obtained from said gaseous mixture by hydrogenating the gaseous mixture in the presence of a hydrogenation catalyst, in which a first metal (M₁), which is active with respect to hydrogenation, and a second metal (M₂), the function of which is to induce selective hydrogenation, are deposited on a porous substrate, and c) separating and extracting ethylene and hydrogen from the hydrogenation product, wherein the first metal (M₁) is at least one metal selected from the group consisting of Pd, Pt, Rh, Ir, Ni and Co, and the second metal (M₂) is at least one metal selected from the group consisting of Cu, Ag, Au, Zn, Ga and Sn, and the amount of the first metal (M₁) and the second metal (M₂) in the hydrogenation catalyst ranges from 0.15 to 2 wt.% and from 0.8 to 30 wt.%, respectively, and satisfies the equation: 3≤W_M2/W_M1<20, in which W_M1 denotes the weight percentage of the first metal in the hydrogenation catalyst, and W_M2 denotes the weight percentage of the second metal in the hydrogenation catalyst.

EFFECT: obtaining as a product of hydrogenation of a gaseous mixture containing, in particular, acetylene and hydrogen, ethylene as a valuable chemical raw material.

16 cl, 8 dwg, 3 tbl, 5 ex