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:
Jun. 14, 1988
Filed:
Dec. 05, 1986
Claus Flockenhaus, Essen, DE;
Erich Hackler, Essen, DE;
Karl H Laue, Hattingen, DE;
Klaus Merkel, Essen, DE;
Arnold Max, Bottrop, DE;
Werner Stender, Raesfeld, DE;
Johann Jansen, Duisburg, DE;
Hartmut Kainer, Wiesbaden, DE;
Daniel Grimm, Schlangenbad-Barstadt, DE;
Blagoje Levkov, Wiesbaden, DE;
Didier Engineering GmbH, Essen, DE;
Didier-Werke AG, Wiesbaden, DE;
Abstract
The invention relates to a process for the manufacture of a catalyst for the reduction of nitrogen oxides in exhaust gases. The catalyst contains a metal oxide. The catalyst is preferably used for catalytic reduction with ammonia. The process comprises screening a natural goethite iron ore to the required grain size and then treating the ore with sulfuric acid. Subsequently, the goethite iron ore is heated to a temperature which approximately equals the temperature at which it will be used in the catalytic reaction.