Process for preparation of oxidazable oxides of nitrogen from wa

Details Process for preparation of oxidazable oxides of nitrogen from wa Process for preparation of oxidazable oxides of nitrogen from wa

1988-04-26

1990-04-10

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01J 800, C01B 1700

Patent

active

049159224

ABSTRACT:
Oxides of nitrogen can be removed from waste gas flows containing NO and er oxides of nitrogen by contact of the waste gas with a solid material layer that can be washed off and regenerated, without leaving detectable residues of NO in the cleaned gas. In order to improve the separation of NO.sub.x with diminution of residual NO, the solid material layer is provided with a reagent for oxidizing NO and for binding NO in the solid material layer in oxidized form. Permanganate, especially potassium permanganate, is particularly well suited to be the oxidizing component of the solid material layer. If the gas to be cleaned includes nitrogen oxides other than NO, an alkaline additive is mixed with the permanganate in preparing the solid layer. The solid material layer can be deposited from a water solution of potassium permanganate, with or without an alkaline additive such as sodium carbonate, onto the walls, or onto the surfaces of an impermeable packing aggregate, inside a reactor and it is advantageous to heat those walls or packing surfaces to a temperature above 150.degree. C. during operation for the most effective separation of nitrogen oxides.

REFERENCES:
patent: 3382033 (1968-05-01), Kitagawa

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