CATALYST FOR HYDROGENATION OF BENZENE AND ITS HOMOLOGUES Russian patent published in 2025 - IPC B01J23/755 B01J21/02 B01J21/10 B01J37/02 B01J37/16 C07C5/10 

FIELD: chemistry.

SUBSTANCE: invention relates to an aromatic ring reduction catalyst which can be used in organic synthesis in a flow reactor. Disclosed is a catalyst for hydrogenation of benzene and its homologues in form of nanostructured nickel particles immobilized on a substrate. Substrate used is a mixture obtained after baking and grinding a paste of magnesium hydroxide and boric acid, taken in molar ratio of base : acid equal to 2.75:1. Nickel nanoparticles are deposited by impregnating a substrate while boiling in a solution of nickel chloride hexahydrate, with a weight ratio of substrate : nickel chloride hexahydrate equal to 1:2, with subsequent reduction of adsorbed nickel chloride at temperature 70-80 °C for 1 hour. Reduction is carried out with mixture of 0.025 wt.% aqueous solution of sodium borohydride and hydrazine monohydrate, taken in molar ratio of 4:3.

EFFECT: development of efficient hydrogenation catalyst with increased specific output.

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