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:
Jul. 01, 2008
Filed:
Mar. 21, 2003
Meinhard Schwefer, Meschede, DE;
Michael Groves, Gevelsberg, DE;
Meinhard Schwefer, Meschede, DE;
Michael Groves, Gevelsberg, DE;
Uhde GmbH, , DE;
Abstract
A process for reducing the content of NOand NO in gases, in particular in process gases and offgases, which comprises the measures: a) addition of at least one nitrogen-containing reducing agent to the NO- and NO-containing gas in at least the amount required for complete reduction of the NO; b) addition of a hydrocarbon, of carbon monoxide, of hydrogen, or of a mixture of one or more of these gases to the NO- and NO-containing gas for the reduction of the NO; and c) introduction of the gas mixture into at least one reaction zone at temperatures of up to 450° C., which contains one or more iron-laden zeolites. The process can be used, in particular, in nitric acid production, for offgases from power stations or for gas turbines.