Dilute acid oxidation of dinitrotoluene alkaline wash water

Details Dilute acid oxidation of dinitrotoluene alkaline wash water Dilute acid oxidation of dinitrotoluene alkaline wash water

1997-05-01

1998-06-09

Kruskoci, Peter A.

Liquid purification or separation

Processes

Treatment by living organism

210631, 210694, 210766, 210909, 568934, C02F 172

Patent

active

057628025

ABSTRACT:
A process for removing nitrocresols in a crude aqueous alkaline dinitrotoluene wash stream derived by nitration of toluene using a mixed acid technique followed by treatment with aqueous alkaline material in which the crude aqueous alkaline dinitrotoluene wash stream is mixed with a dilute oxidizing acid such as nitric acid, heated to 130.degree. to 180.degree. C. for a period of time required to reduce the nitrocresols to a level at which it does not precipitate from the mixed acidic wash stream at temperatures above about 60.degree. C., and removing the remaining nitrocresols by conventional methods such as adsorption or activated sludge biotreatment.

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