| abstract |
Process for obtaining hydrazobenzene by alkaline catalytic hydrogenation of nitrobenzene with hydrogen in alcoholic solution. As the alkaline agent, an alkali alcoholate and / or an alkali hydroxide is used, while the hydrogenation is carried out under pressures equal to or greater than 1 bar and at temperatures up to 120 degrees C, preferably up to at 90 ° C., the reaction mixture being kept in turbulent motion. The liquid is pumped at 2 in a circuit 5 which brings it into a nozzle 3 at the top of the reactor 1. The hydrogen is introduced at 4a or 4b. |