CATALYST FOR HYDROGENATION OF BENZENE AND ITS HOMOLOGUES Russian patent published in 2024 - IPC B01J23/755 B01J21/04 B01J37/02 B01J37/08 B01J37/18 C07C5/10 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: invention relates to catalysts for reducing an aromatic ring and can be used in organic synthesis. Catalyst for hydrogenation of benzene and its homologues consists of nanostructured nickel particles immobilized on gamma-aluminium oxide. Nickel nanoparticles are deposited by impregnation of gamma-aluminium oxide while boiling in a solution of nickel chloride hexahydrate and carbamide in 7 wt.% aqueous ammonia solution, followed by addition of boric acid. Weight ratio of γ-Al₂O₃, nickel chloride hexahydrate, carbamide, boric acid is equal to 1:2:2.4:0.6, respectively. Adsorbed nickel chloride is reduced at temperature of 80-100 °C for 1 hour with mixture of 0.025 wt.% aqueous solution of sodium borohydride and hydrazine monohydrate, taken in molar ratio of 4:3.

EFFECT: invention enables to obtain an efficient hydrogenation catalyst with high specific output and stability.

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