METHOD FOR REMOVING IMPURITIES FROM DINITROTOLUENES

The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dintrotoluene,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BERGMANN, TIM, POHLMANN, JURGEN, HERMANN, HEINRICH, HANDEL, MIRKO, GEBAUER, JURGEN
Format: Patent
Sprache:eng ; fre
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Beschreibung
Zusammenfassung:The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dintrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dintrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).