VERFAHREN ZUR DESTILLATIVEN ABTRENNUNG VON DINITROTOLUOL AUS EINEM PROZESSABWASSER AUS DER HERSTELLUNG VON DINITROTOLUOL DURCH NITRIERUNG VON TOLUOL MIT NITRIERSÄURE
A process is proposed for distillatively removing dinitrotoluene from process wastewater from the preparation of dinitrotoluene by nitrating toluene with nitrating acid, which comprises basifying the process wastewater to a pH of >8.5, feeding it to a stripping column in the upper region thereof...
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Zusammenfassung: | A process is proposed for distillatively removing dinitrotoluene from process wastewater from the preparation of dinitrotoluene by nitrating toluene with nitrating acid, which comprises basifying the process wastewater to a pH of >8.5, feeding it to a stripping column in the upper region thereof and stripping it with steam in countercurrent to obtain a vapor stream laden with dinitrotoluene and a bottom stream depleted in dinitrotoluene compared to the process wastewater used. |
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