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:
Dec. 31, 2013
Filed:
Oct. 12, 2011
Josef Macht, Mannheim, DE;
Klaus Joachim Mueller-engel, Stutensee, DE;
Frank Rosowski, Mannheim, DE;
Josef Macht, Mannheim, DE;
Klaus Joachim Mueller-Engel, Stutensee, DE;
Frank Rosowski, Mannheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for long-term operation of a heterogeneously catalyzed partial gas phase oxidation of propene to acrolein, in which the propene present in the reaction gas input mixture is partially oxidized as this gas mixture passes through the fixed catalyst bed which is accommodated in two spatially successive temperature zones A, B, and, in long-term operation, as a measure to counteract the reduction in the quality of the fixed catalyst bed, the temperature of at least one of the two temperature zones is increased such that the difference T−Tbecomes increasingly greater, where Tis the temperature of temperature zone B, and Tthe temperature of temperature zone A.