Catalytic synthesis of aliphatic and aromatic primary amines of mono-, dinitriles
Abstract
The kinetics of hydrogenation of aliphatic and aromatic nitriles, dinitriles in alcohol under the pressure of hydrogen on Ni-Nb (5% Nb) catalyst was systematically studied. The increase of the molecular weight and the change of the structure of nitrile result in the decrease of their hydrogenation rate. The nitriles may be placed in the following row according to the decrease of the initial rate of hydrogenation: acetonitrile (M.=41) > benzonitrile (M.=103) > terephtalonitrile (M.=128) > β-decyloxypropionitrile - β-DOPN (M.=211) > stearonitrile (M.=265). The yield of primary amines reaches 96-98% (nitril:ammonia=1:3(g/g)). The kinetic and potentiometric curves of hydrogenation of mono-, dinitriles on Ni-Nb catalyst are presented.
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