Method and apparatus for the oxidation of organic material present in concentrated sulfuric acid
AssigneeNoranda Mines Limited
InventorsMohammad Barakat Ilahi Janjua, Pierre L. Claessens, Raouf O. Loutfy
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Abstract
A method for the oxidation of organic material present in concentrated sulfuric acid is disclosed. The method comprises the steps of diverting a portion of a concentrated sulfuric acid stream, diluting the diverted stream with water to about 40-70% sulfuric acid concentration, passing the diluted stream through an electrolysis apparatus to oxidize some of the sulfuric acid to form a predetermined quantity of peroxosulfuric acids, and returning the diverted stream back to the main stream to oxidize the organic material and decolorize the main stream of concentrated sulfuric acid.
Claims13
A method for the on-site generation of peroxosulfuric acids for the oxidation of organic materials in concentrated sulfuric acid comprising the steps of:
- (a) diverting a portion of main concentrated sulfuric acid stream;
- (b) diluting the diverted stream with water to about 40-70% sulfuric acid concentration;
- (c) passing the diluted stream at a temperature between 5.degree. and 20.degree. C through an electrolysis apparatus operated at a current density between 50 and 200 ASD to oxidize some of the sulfuric acid to form a predetermined quantity of peroxosulfuric acids;
- and
- (d) returning the diverted stream with said predetermined quantity of peroxosulfuric acids to the main stream to oxidize the organic materials and decolorize the main stream of sulfuric acid.
A system for the on-site generation of peroxosulfuric acids for the oxidation of organic materials in concentrated sulfuric acid comprising:
- (a) means for diverting a portion of a main stream of concentrated sulfuric acid;
- (b) means for adding water to said diverted sulfuric acid stream to dilute it to about 40-70%.
- (c) means for passing said diluted stream at a predetermined flow rate and at a temperature between 5.degree. and 20.degree. C into an electrolytic apparatus operated at a current density between 50 and 200 ASD to oxidize some of the sulfuric acid and form a predetermined quantity of peroxosulfuric acids;
- and
- (d) means for returning the diverted stream with said predetermined quantity of peroxosulfuric acids back to the main stream to oxidize the organic materials and attain decolorization of the main stream of sulfuric acid.
Dependencies are inferred from the claim text.