METHOD FOR MANUFACTURING OF CATALYST FOR LIQUIDPHASE HYDRATION OF 2',4',4-TRINITROBENZANILIDE Russian patent published in 2014 - IPC B01J23/44 B01J23/745 B01J23/75 B01J23/89 B01J21/04 B01J37/02 B01J37/08 C07C233/80 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to petrochemical analysis, in particular to method for manufacturing of catalyst for liquidphase hydration of 2',4',4-trinitrobenzanilide (TNBA) with obtainment of aromatic polyamine compounds widely used as intermediate products in production of dyes, heat-resistant polymers, synthesis of high-strength fibres, etc. The method for manufacturing of catalyst for liquidphase hydration of 2',4',4-TNBA includes impregnation of the cellular structure polyurethane matrix with ceramic slurry containing more than 30 wt % of α-aluminium oxide with subsequent drying at temperature of 100-120°C, tempering at temperature of 1050-1070°C, subsequent impregnation of the obtained high-porous cellular carrier by alumina sol (γ-Al₂O₃), drying at temperature of 100-120°C, tempering at temperature of 550-600°C, subsequent impregnation by aqueous solution of cobalt and iron nitrates at atmospheric temperature, tempering at 350-400°C, and upon tempering application of carbon nanotubes manufactured by methane pyrolysis at temperature less than 800°C, up to 0.15-0.20 wt % of the weight of the carrier with γ-Al₂O₃, then treatment with palladium nitrate solution, drying at temperature less than 120°C and tempering at temperature of 430-450°C, recovery of the obtained palladium oxide at the carrier by molecular hydrogen in nitrogen till palladium metal is obtained at temperature of 50-55°C.

EFFECT: reduction of the reaction duration, increase in the reaction rate due to increase of the catalyst specific surface, TNBA load to the catalyst, output of the target product.

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