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US 2008/0025910 A1Published application
Process to make both nitric and sulfuric acid
OwnerRobert Neville O'Brieninventor
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OwnerRobert Neville O'Brieninventor
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Stirred acid resistant shallow cylindrical reactors are used to produce both nitric and sulfuric acid from a feed gas stream arranged to contain both sulfur dioxide and nitrogen oxides passed over or through the mixed acids. The homogeneous catalytic mixture of sulfuric and nitric acids uses the highly oxidizing nitrosyl ion to further oxidize the gaseous oxide stream to sulfuric and nitric acids. Oxygen or air then oxidizes the nitrosyl ion reduction products back to nitrosyl ion for further reaction. The acids are separated by distillation, and concentrated using heat from the burner and the reaction heat. The modified sulfur burner used operates at temperatures to oxidize some of the nitrogen in the air. The temperature required may be obtained by increasing the oxygen of the air by pure oxygen. More nitrogen oxides may be produced by a glow discharge into the burner air or burning of ammonia. Any heavy metals such as mercury will be first oxidized then precipitated as sulfates.
1-11. (canceled)
A method for using a mixture of nitric and sulfuric acid to form a homogenous catalytic solution of nitrosyl ion, a gas containing sulfur dioxide, nitrogen oxides and oxygen in ambient air where this gas mmixture is converted to both sulfuric and nitric acids when passed into a stirred reactor via reaction with the nitrosyl ion, the reduction products of the nitrosyl ion re-oxidized by the residual oxygen in the air or added oxygen, the gas being obtained from
Heavy metals present in the fuel are first oxidized then precipitated as the sulfates in the strong sulfuric acid produced in both in the reaction vessel and in the still producing sulfuric acid for sale.
Dependencies are inferred from the claim text.