METHOD FOR CATALYTIC LIQUID-PHASE HYDROGENATION OF 2',4,'4-NRINITROBENZANILIDE Russian patent published in 2006 - IPC C07C233/80 B01J23/44 B01J21/04 

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention to a method for catalytic liquid-phase hydrogenation of 2',4',4-trinitrobenzanilide to yield aromatic polyamino-compounds. Method for liquid-phase hydrogenation of 2',4',4-trinitrobenzanilide is carried out at heating in water medium as a solvent in the presence of palladium-containing catalyst on a carrier. The process is carried out on block high-porous cellular catalyst with porosity value 70-95%, not less, and consisting of aluminum α-oxide-base carrier with active backing made of γ-Al₂O₃ palladium as an active component with the mass ratio = 0.45-0.85%. Invention provides simplifying technology of process with elimination of the separation step of catalyst from the hydrogenation catalyzate, prevention of the catalyst destruction, enhancing purity of the end product and increasing working life of the catalyst.

EFFECT: improved method of method.

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