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. 25, 2003
Filed:
Aug. 30, 2001
Applicant:
Inventors:
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;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 5/125 ; C07C 4/535 ; C07C 5/704 ; C07C 4/722 ;
U.S. Cl.
CPC ...
C07C 5/125 ; C07C 4/535 ; C07C 5/704 ; C07C 4/722 ;
Abstract
A process for the catalytic gas-phase oxidation of propene to acrylic acid, in which the reaction gas starting mixture is oxidized, with an increased propene loading, in a first reaction stage, over a first fixed-bed catalyst and then the acrolein-containing product gas mixture of the first reaction stage is oxidized, in a second reaction stage, with an increased acrolein loading, over a second fixed-bed catalyst, the catalyst moldings in both reaction stages having an annular geometry.