Method for the denitration of waste gases with obtention of HNO.

Details Method for the denitration of waste gases with obtention of HNO. Method for the denitration of waste gases with obtention of HNO.

1991-05-06

1992-05-12

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423239, 423390, 423393, C01B 2100, C01B 2138, C01B 2140, B01J 800

Patent

active

051125870

ABSTRACT:
A method for the removal of nitrogen oxides from waste gases and for obtaining nitric acid is described. The waste gas is charged with the required amount of hydrogen peroxide, converted into the gas phase, and the gas mixture is reacted on a solid catalyst to hydrogen nitrate, which is either withdrawn for further use or is converted into nitric acid either by condensation or by scrubbing with water. The method permits the removal of NO.sub.x at low concentrations below 2000 ppm with efficiencies above 90%.

REFERENCES:
patent: 4341747 (1982-07-01), Downey
patent: 4367204 (1983-01-01), Klopp et al.

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