Waste treatment process
AssigneeSterling Drug Inc.
InventorColin F. Coates
Life of this patent
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Abstract
Treatment of aqueous waste liquors containing diazonium salts with sulfite ions decomposes the diazonium salts without the formation of undesirable tar or foam, yielding a liquor amenable to further treatment with an oxidizing agent, e.g. hydrogen peroxide, to yield an effluent suitable for discharge to the environment.
Claims9
A process for preventing tar or foam formation in an aqueous waste containing diazonium salts, thereby rendering said waste liquor suitable for disposal or further treatment, which comprises treating said waste liquor with sulfite ions in amount sufficient to decompose substantially all of the diazonium salts in said waste liquor.
The process for treating an aqueous waste containing diazonium salts while preventing the formation of tar or foam, which comprises adding to said aqueous waste sulfite ions in amount sufficient to decompose substantially all of the diazonium salts, and then treating the resulting aqueous mixture with an oxidizing agent.
Dependencies are inferred from the claim text.