METHOD OF HYDROGENATING BENZENE AND ITS HOMOLOGUES Russian patent published in 2024 - IPC C07C5/10 C07B35/02 C07C13/18 B01J23/755 B01J37/16 

FIELD: organic chemistry.

SUBSTANCE: invention relates to organic chemistry, specifically to a method of hydrogenating benzene and its homologues and can be used in organic synthesis to produce solvents and reagents based on cyclohexane and its substituted derivatives. Hydrogenation method consists in continuous passage of a mixture of a substrate and hydrogen at temperature of 140-160 °C through a catalytic layer of nickel nanoparticles deposited on a substrate, and is characterized by that the substrate used is a mixture obtained after baking and grinding a paste of boric acid and magnesium oxide or magnesium hydroxide. Nickel nanoparticles are applied by impregnating a substrate when boiling with an aqueous solution of nickel chloride hexahydrate, with subsequent reduction of adsorbed nickel chloride at temperature 70-80 °C with a mixture of an aqueous solution of sodium borohydride and hydrazine monohydrate, with drying of the catalyst in a stream of hydrogen at 300 °C immediately before the reaction. Hydrogenation is carried out at molar ratio substrate : hydrogen = 1:(4.95-6.23).

EFFECT: achieving 100% conversion of the aromatic substrate with reduced hydrogen consumption.

1 cl, 10 ex