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:
Feb. 14, 2006
Filed:
Feb. 28, 2000
Signe Unverricht, Mannheim, DE;
Heiko Arnold, Mannheim, DE;
Andreas Tenten, Maikammer, DE;
Ulrich Hammon, Mannheim, DE;
Hans-peter Neumann, Ludwigshafen, DE;
Klaus Harth, Altleiningen, DE;
Signe Unverricht, Mannheim, DE;
Heiko Arnold, Mannheim, DE;
Andreas Tenten, Maikammer, DE;
Ulrich Hammon, Mannheim, DE;
Hans-Peter Neumann, Ludwigshafen, DE;
Klaus Harth, Altleiningen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for the catalytic gas-phase oxidation of propene to acrylic acid, in which the reaction gas starting mixture is oxidized, with a high propene loading, in a first reaction stage, over a first fixed-bed catalyst which is housed in two successive reaction zones A, B, the reaction zone B being kept at a higher temperature than the reaction zone A, and the acrolein-containing product gas mixture of the first reaction stage is then oxidized in a second reaction stage, with a high acrolein loading, over a second fixed-bed catalyst which is housed in two successive reaction zones C, D, the reaction zone D being kept at a higher temperature than the reaction zone C.