METHOD OF PRODUCING AMINES VIA HYDROGENATION OF NITRILE COMPOUNDS Russian patent published in 2011 - IPC C07C209/48 C07C211/12 

FIELD: chemistry.

SUBSTANCE: hydrogen-containing gas and a dinitrile compound such as adiponitrile are fed into a displacement type reactor in which a reaction mixture is circulating, said reaction mixture containing suspended particles of a Raney metal-based catalyst, an inorganic base and water; one part of the reaction mixture containing an amine compound is tapped at the output of said displacement type reactor; after separating the catalyst, the other part is recirculated into the displacement type and the separated catalyst is then recirculated into the displacement type reactor and a new catalyst is fed into the displacement type reactor. The feeding of dinitrile compounds and/or catalyst into the displacement type reactor is controlled to maintain a ratio P of the number of moles of dinitrile compounds fed per unit time and mass feed of the catalyst into the displacement type reactor in the range of 0.02-0.15 mol of dinitrile compounds per 1 kg of catalyst in case of a catalyst having initial activity in the range of 15·10^-5-35·10^-5 (mol H₂)/(r catalyst)/c.

EFFECT: method enables to limit formation of impurities and lowers the rate of deterioration of catalyst activity.

13 cl, 2 ex, 2 dwg