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:
Jan. 23, 1990
Filed:
Aug. 12, 1988
Hartmut Kainer, Wiesbaden, DE;
Eugen Buhler, Konigstein, DE;
Daniel Grimm, Bad Schwalbach, DE;
Wilfried Schenelle, Wiesbaden, DE;
Claus Flockenhaus, Essen, DE;
Karl-Heinrich Laue, Hattingen, DE;
Klaus Merkel, Essen, DE;
Didier-Werke AG, Wiesbaden, DE;
Didier Engineering GmbH, Essen, DE;
Abstract
This invention relates to a process for the manufacture of catalysts for the reduction of nitrogen oxides in exhaust gases or for chemical air cleaning processes, in which catalyst moldings are produced from iron oxide or mixtures of iron oxide and chromium oxide and/or manganese oxide, which are reduced to grain sizes less than 2 mm, with the use of inorganic binders and sulfuric acid, and with the possible addition of activating additives. In accordance with the invention: