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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Hauptverfasser: PENZEL, ULRICH, ADAM, JOHANNES, FRITZ, RUEDIGER, MERTEN, ANNE-KATHRIN, ALLARDT, HOLGER
Format: Patent
Sprache:ger
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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.