METHOD OF PRODUCING AROMATIC AMINES Russian patent published in 2017 - IPC C07C209/36 C07C211/46 C07C211/48 C07C211/52 B01J21/06 

FIELD: chemistry.

SUBSTANCE: method consists in the reduction of aromatic nitro compounds in supercritical isopropyl alcohol as a solvent at a temperature of 270-330°C and pressure of P = 180-200 atm. A feature of the proposed method is the reduction reaction of aromatic nitro compounds in the presence of a heterogeneous zirconia catalyst ZrO₂ or titanium dioxide TiO₂. Preferably, the process is to be carried out in a flow tube type reactor. As a supercritical solvent, isopropyl alcohol can be used with the addition of supercritical CO₂. The method allows to simplify the process by eliminating explosive molecular hydrogen, significantly shortening the process time by increasing the reaction rate, and avoiding the formation of decomposition products.

EFFECT: method allows to control the selectivity of target product formation.

5 tbl, 5 ex