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:
Mar. 28, 2006
Filed:
Sep. 07, 2004
Frieder Borgmeier, Mannheim, DE;
Frank Rosowski, Mannheim, DE;
Hans-günther Lintz, Karlsruhe, DE;
Ina Grisstede, Karlsruhe, DE;
Frieder Borgmeier, Mannheim, DE;
Frank Rosowski, Mannheim, DE;
Hans-Günther Lintz, Karlsruhe, DE;
Ina Grisstede, Karlsruhe, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing (meth)acrylic acid by conducting a saturated hydrocarbon precursor compound through a catalyst bed I whose catalysts I have, as the active composition, a multimetal oxide I which has a specific X-ray diffractogram and contains the elements Mo and V, at least one of the elements Te and Sb, and also at least one of the elements from the group consisting of Nb, Ta, W, Ce and Ti, wherein the catalyst bed I is interrupted by at least one catalyst bed II whose catalysts II have, as the active composition, a multimetal oxide II which contains the elements Mo, Bi and Fe.