BIMETALLIC CATALYST FOR LIQUID-PHASE SELECTIVE HYDROGENATION OF ACETYLENIC HYDROCARBONS AND METHOD FOR ITS PRODUCTION Russian patent published in 2022 - IPC B01J23/89 B01J23/44 B01J23/72 B01J21/08 B01J35/10 B01J37/02 B01J37/08 B01J37/18 

FIELD: catalytic chemistry.

SUBSTANCE: present invention relates to the field of catalytic chemistry, in particular to a bimetallic catalyst for liquid-phase selective hydrogenation of phenylacetylene and dimethylethynylcarbinol and to a method for its production. A bimetallic catalyst is proposed containing palladium and copper deposited on silicon oxide with a specific surface area of 100-300 m²/g, with the following ratio of components, wt.%: palladium 0.5-0.8, copper 0.9-1.1, silicon oxide - the rest. In the catalyst, palladium is in the Pd⁰ state, copper is in the Cu⁺ and Cu²⁺ state. The method for producing a catalyst consists in impregnating silicon oxide with a specific surface area of 100-300 m²/g with an aqueous solution of copper nitrate, followed by drying the obtained copper sample, calcining it at a temperature of 300°C, reducing it in a hydrogen flow at a temperature of 400°C and processing of a reduced monometallic copper sample with an aqueous solution of a palladium precursor - H₂PdCl₄.

EFFECT: creation of a highly active bimetallic palladium-copper catalyst characterized by high values of specific activity (0.89-2.03 s-1) and selectivity (91-95%) with almost complete conversion in the process of hydrogenation of phenylacetylene and dimethylethynylcarbinol with the formation of the corresponding olefins under mild conditions (at atmospheric pressure and room temperature), and the development of a method for preparing a catalyst that ensures the formation of homogeneous bimetallic active particles containing palladium in the Pd⁰ state, copper in the Cu⁺, Cu²⁺ state, which determines the high reproducibility of catalytic properties.

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