Patent ID: 7763759

Claim:
A continuous process for the manufacture of nitrobenzene comprising (1) nitrating benzene with a nitrating acid in a reaction space in which said benzene and said nitrating acid are dispersed in one another several times, wherein: a) said nitrating acid contains at least 3.0 wt. %, based on 100 wt. % of said nitrating acid, of nitric acid and at least 67.0 wt. % of sulfuric acid, based on 100 wt.% of said nitrating acid; b) the starting temperature of the reaction is above 100.0° C. but below 102.0° C.; c) the emulsion of said nitrating acid and said benzene which is obtained after the first dispersion is redispersed at least 4 times before the nitric acid conversion is 60%; and d) at least 60% of said nitric acid used is converted within the first 13 vol. % of the reaction space in the direction of flow of the reactants after the first dispersion.