ACID SLUDGE ADSORPTION OF DNT WASTE WATER

ACID SLUDGE ADSORPTION OF DNT WASTE WATER

A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics, said alkaline process wastewater having a pH of 7.5 to 13, comprising the steps of a) acidifying the alkaline process wastewater by adding concentrated sulfuric acid whi...

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Bibliographische Detailangaben
Hauptverfasser: GERSDORF, ANNETT, FLEGEL, ELVIRA, ZSCHIESCHANG, DORIS, FRITZ, RÜDIGER, HEMPEL, RENATE, ZÖLLINGER, MICHAEL, MERTEN, ANNE-KATHRIN, REETZ, REINER, HOMANN, INA, ALLARDT, HOLGER
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics, said alkaline process wastewater having a pH of 7.5 to 13, comprising the steps of a) acidifying the alkaline process wastewater by adding concentrated sulfuric acid which originates from the workup of the aqueous, sulfuric acid-containing phase obtained in the nitration to a pH below 5, which forms a mixture A consisting of organic phase which separates out and acidic aqueous phase, b) contacting the mixture A with fresh sewage sludge, and c) removing the sewage sludge.