Catalytic reduction process of nitrobenzene to aniline in liquid phase

Zpusob hydrogenace nitrobenzenu na anilin v kapalné fázi spocívá v tom, že hydrogenace se provádí ve dvou reakcních zónách, pricemž v první zóne se pracuje pri teplote 150 - 250 .degree.C a koncentrace nitrobenzenu se udržuje na úrovni 0,05 - 0,5 %hmotn. a smes z 1. zóny se hydrogenuje ve druhé zóne pri teplote 50 - 100 .degree.C na zbytkovou koncentraci nitrobenzenu maximálne 10 ppm. The method of the catalytic reduction of nitrobenzene to aniline in the liquid phase, where the hydrogenation is conducted in two reaction zones, where the first zone operates at the temperatures from 150°C to 250°C and the nitrobenzene concentration is kept within the range from 0.05% to 0.5% and the mixture from the first zone is hydrogenated in the second zone at 50°C to 100°C to the residual nitrobenzene concentration of maximally 10 ppm.