The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1990
Filed:
Apr. 26, 1988
Peter Filss, Julich, DE;
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.