FIELD: industrial organic synthesis. SUBSTANCE: hydrogenation of aliphatic dinitriles into corresponding aminonitriles is effected continuously in presence of hydrogenation catalyst not soluble in reaction mixture. Gas contained in the reaction mixture is separated at the reactor outlet, in the zone wherein gas-liquid transfer is limited or entirely absent. Reaction mixture with reduced gas phase level is fed into hydrogenation reactor. Part of reaction mixture is withdrawn from above-indicated reaction zone after solid phase separation in liquid/solid separation zone. Solid phase obtained by settling in hydrogenation reactor (reactor residence time less than 30 min) is recycled into liquid/solid separation zone. EFFECT: avoided deactivation of catalyst. 16 cl, 2 dwg, 1 tbl, 3 ex
