Patent ID: 6395188
Filing Date: 2002-05-28
Classification: C02F,Y10S

Abstract:
In a process for the wet oxidation of waste streams containing carbonaceous components and nitrogenous components, and sulfur or phosphorous containing components, using ammonium nitrate or precursor thereof as the oxidizing agent under conditions wherein the carbon and nitrogen forms are determined and the oxidized and reduced forms of carbon and nitrogen balanced such that the carbon forms are converted to carbon dioxide and the nitrogen forms and the sulfur or phosphorous containing components are converted to salts under elevated temperature and pressure conditions sufficient to maintain liquid phase conditions, the improvement which comprises adding acetate ion to the waste stream In an amount of from 0.06 to 0.17 moles/moles of nitrate or, if carbonaceous material convertible to acetate ion is present in the waste stream, maintaining a mole ratio of. acetate ion to nitrate in an amount of at least 0.06 moles acetate/mole nitrate, and maintaining a ratio of M/SO4âˆ’2 of from 0.1 to 4:1 and/or a ratio of M/PO4âˆ’3 of 0.1 to 2:1 in the waste stream during wet oxidation, wherein M is an alkali metal or alkaline earth metal cation and the ratio is maintained on an equivalence basis.