LIQUID PHASE METHOD OF HYDROGENATION OF 2',4,'4-TRINITROBENZANILIDE Russian patent published in 2009 - IPC C07C233/80 B01J21/06 B01J23/56 B01J35/04 

FIELD: chemistry.

SUBSTANCE: present invention pertains to the improved method of catalytic liquid phase hydrogenation of 2',4',4-trinitrobenzanilide. The obtained compound can be used as an intermediate product when making dyes, heat-resistant polymers, synthesis of high-strength fibers etc. Liquid phase hydrogenation of 2',4',4-trinitrobenzanilide takes place when heating in a medium of a mixture of isopropyl and toluene, with ratio (weight parts) from 3:7 to 7:3 on a block highly-porous honeycomb catalyst with porosity not less than 80-90%. The catalyst consists of a carrier based on α-aluminium oxide with an active substrate from sulphated zirconium dioxide and an active component - palladium. The active substrate from zirconium dioxide is taken in quantity not more than 8.0 wt %.

EFFECT: use of the proposed invention cuts reaction time by 4-10 times, increases load on the catalyst by up to 5 times and allows for continuous catalytic liquid phase hydrogenation of 2',4',4-trinitrobenzanilide.

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