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. 28, 2009
Filed:
May. 07, 2004
Martin Dieterle, Mannheim, DE;
Hartmut Hibst, Schriesheim, DE;
Wolfgang Juergen Poepel, Darmstadt, DE;
Jochen Petzoldt, Mannheim, DE;
Klaus Joachim Mueller-engel, Stutensee, DE;
Martin Dieterle, Mannheim, DE;
Hartmut Hibst, Schriesheim, DE;
Wolfgang Juergen Poepel, Darmstadt, DE;
Jochen Petzoldt, Mannheim, DE;
Klaus Joachim Mueller-Engel, Stutensee, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Catalytically active multielement oxide materials which contain at least one of the elements Nb and W and the elements Mo, V and Cu are prepared by a process in which an intimate dry blend containing ammonium ions is prepared and said dry blend is subjected to a thermal treatment in an atmosphere having a low molecular oxygen content at elevated temperatures, a portion of the ammonium ions contained in the intimate dry blend being decomposed with liberation of ammonia and the oxygen content of the thermal treatment atmosphere being increased in the course of the thermal treatment.