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. 19, 1990
Filed:
Mar. 29, 1989
Hartmut Kainer, Wiesbaden, DE;
Bernhard Vedder, Kelkheim, DE;
Daniel Grimm, Bad Schwalbach, DE;
Wilfried Schnelle, Wiesbaden, DE;
Albert Kleinevoss, Hohr-Grenzhausen, DE;
Hans-Eugen Buhler, Konigstein, DE;
Klaus Merkel, Essen, DE;
Claus Flockenhaus, Essen, DE;
Karl-Heinrich Laue, Hattingen, DE;
Manfred Galow, 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 oxides of nitrogen from exhaust gases and in chemical air cleaning processes in which a catalytically active material containing iron ores, chromium ores and/or zeolite is placed in contact with a carrier means having a series of openings; e.g., wire mesh, expanded or perforated metal or any type of grid-like structure to form a catalytic member. The carrier means is etched with an acid etchant before forming the catalytic member or, instead, the catalytic member is etched with an acid etchant. The catalytic member is bonded by a thermal treatment; e.g., drying, tempering and/or fixing. This invention also relates to catalytic members or products produced by the process. This invention proposes the use of pressure bonding to obtain a catalytic member product which has significantly improved catalytic activity, greater mechanical strength and higher resistance to chipping.