Abstract:
This process consists of separate nitrobenzene and aniline production
sections. Primarily 96 and 98 percent sulphuric and nitric acids
respectively are blended and charged to the last of three nitrators
operating at 60-700e. This is done so that the strongest acid stream
always contacts the highest nitrobenzene stream. Overall selectivity of
nitrobenzene is 97 percent. The emulsion from the final nitrator is
decanted, with the acid phase returned to the first nitrator. Mixture from
the second nitrator is separated, from which 5ulphuric acid is recovered and
sent for further concentration. Subsequent steps wash, neutralise and
purify the nitrobenzene for aniline production.
