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. 30, 2013
Filed:
May. 18, 2005
Martin Dieterle, Mannheim, DE;
Klaus Joachim Mueller-engel, Stutensee, DE;
Claus Hechler, Ludwigshafen, DE;
Ulrich Hammon, Mannheim, DE;
Armin Diefenbacher, Germersheim, DE;
Martin Dieterle, Mannheim, DE;
Klaus Joachim Mueller-Engel, Stutensee, DE;
Claus Hechler, Ludwigshafen, DE;
Ulrich Hammon, Mannheim, DE;
Armin Diefenbacher, Germersheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The present invention relates to a process for preparing acrylic acid by two-stage heterogeneously catalyzed partial gas phase oxidation of propylene, in which the propylene source used is a preceding propane dehydrogenation and in which the first oxidation stage is operated with restricted propylene conversion, and unconverted propane and propylene present in the product gas mixture of the second partial oxidation stage are recycled substantially into the preceding propane dehydrogenation.