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:
Feb. 03, 2009
Filed:
Jan. 09, 2001
Meinhard Schwefer, Meschede, DE;
Rainer Maurer, Schwelm, DE;
Thomas Turek, Düsseldorf, DE;
Markus Kögel, Römerberg, DE;
Meinhard Schwefer, Meschede, DE;
Rainer Maurer, Schwelm, DE;
Thomas Turek, Düsseldorf, DE;
Markus Kögel, Römerberg, DE;
Uhde GmbH, , DE;
Abstract
A process is described for reducing the NOconcentration and NO concentration from the residual gas from nitric acid production. The process encompasses the passing of the residual gas leaving the absorption column, prior to entry into the residual gas turbine, through a combination of two stages. The first stage here reduces the NOcontent and the second stage the NO content of the gas, the NO/NO ratio prior to entry of the gas into the second stage being in the range from 0.001 to 0.5, and this gas being brought into contact in the second stage with a catalyst which is substantially composed of one or more iron-loaded zeolites.