Process for working up effluents containing nitro-hydroxy-aromatic compounds
AssigneeBayer Aktiengesellschaft
InventorWolfgang Larbig
Life of this patent
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Abstract
The invention concerns a process for working up an effluent containing nitro-hydroxy-aromatic compounds which comprises heating said effluent to 150.degree. C. to 500.degree. C. with the exclusion of air and oxygen and under elevated pressure. The process results in a decrease of nitro-hydroxy-aromatic compound concentration in the effluent to below 20 ppm. and the resulting material can then be fed to a microbiological sewage plant for further working up, without the microorganisms therein being killed by the bactericidally active nitro-hydroxy-aromatic compounds.
Claims4
Process for treating an effluent containing a nitro- and hydroxy-group containing aromatic compounds which comprises heating said effluent containing said nitro- and hydroxy-group-containing aromatic compounds to a temperature in the range from 150.degree. C. to 500.degree. C. with exclusion of air and oxygen and under elevated temperature from 50 to 150 bars for 5 to 120 minutes.
Dependencies are inferred from the claim text.