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:
Apr. 03, 1990
Filed:
Aug. 12, 1988
Applicant:
Inventors:
Daniel Grimm, Bad Schwalbach, DE;
Hartmut Kainer, Wiesbaden, DE;
Albert Kleinevoss, Hohr-Grenzhausen, DE;
Karl-Heinrich Laue, Hattingen, DE;
Claus Flockenhaus, Essen, DE;
Klaus Merkel, Essen, DE;
Assignees:
Didier-Werke AG, Wiesbaden, DE;
Didier Engineering GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
502209 ; 502210 ; 502211 ; 502213 ; 502217 ; 502221 ; 502222 ;
Abstract
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 a mixture of solid primary materials which include 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, wherein: