METHODS OF SELECTIVE HYDROGENATION Russian patent published in 2023 - IPC C07C5/09 C07C7/167 C07C11/04 B01J23/44 B01J31/02 

FIELD: hydrogenation.

SUBSTANCE: invention is related to a method for selective hydrogenation of acetylene. The method includes introducing a catalyst composition containing a porous support, palladium and at least one ionic liquid into contact with a process gas containing ethylene present in the process gas in an amount of at least 10 mol.%; acetylene present in the process gas in an amount of at least 1 ppm; hydrogen present in the process gas in an amount of at least 5 mol.%; and at least 600 ppm carbon monoxide; the process gas is brought into contact with the catalyst at a weight hour space velocity (WHSV), based on the total volume of catalyst in one layer or multiple layers, ranging from 7,500 h^-1 to 40,000 h^-1. Moreover, the catalyst composition contains a porous carrier in an amount of 90 wt.% up to 99.9 wt.%; palladium, in an amount of at least 0.02 wt.% in terms of the mass of the element; and one or more ionic liquids, in a combined amount of up to 10% by weight, and the hydrogenation catalyst has a BET surface area of not more than 10 m²/g and a pore volume of at least 0.05 ml/g. At least 90% of the acetylene present in the process gas is hydrogenated, and no more than 1 mol.%. of the total amount of acetylene and ethylene present in the process gas is converted into ethane.

EFFECT: method eliminates the undue risk of uncontrolled thermal conditions.

12 cl, 9 dwg, 1 tbl, 9 ex