Aniline

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.