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. 14, 2009
Filed:
Dec. 19, 2006
Ulrich Cremer, Mannheim, DE;
Ulrike Wegerle, Worms, DE;
Gerhard Laqua, Mutterstadt, DE;
Ulrich Hammon, Mannheim, DE;
Klaus Joachim Mueller-engel, Stutensee, DE;
Ulrich Cremer, Mannheim, DE;
Ulrike Wegerle, Worms, DE;
Gerhard Laqua, Mutterstadt, DE;
Ulrich Hammon, Mannheim, DE;
Klaus Joachim Mueller-Engel, Stutensee, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for heterogeneously catalyzed gas phase partial oxidation of an organic starting compound over a fixed catalyst bed freshly installed into a reaction chamber, in which the reduction in the quality of the fixed catalyst bed is restored with increasing operating time by replacing a portion of the fixed catalyst bed by a replacement fixed catalyst bed part whose volume-specific activity is lower than the volume-specific activity of the replaced fixed catalyst bed part in its freshly installed state.