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:
Jun. 04, 2019
Filed:
Mar. 16, 2016
Basf SE, Ludwigshafen, DE;
Philipp Grüne, Mannheim, DE;
Christian Walsdorff, Ludwigshafen, DE;
Markus Schubert, Ludwigshafen, DE;
Holger Borchert, Offstein, DE;
Jacob Cornelis Van Dorland, Hemsbach, DE;
Jürgen Zühlke, Speyer, DE;
Stefan Lipp, Karlsruhe, DE;
Michael Krämer, Katzweiler, DE;
BASF SE, Ludwigshafen am Rhein, DE;
Abstract
The invention relates to shaped catalyst bodies for the oxidation of SOto SO, which comprise vanadium, at least one alkali metal and sulfate on a silicon dioxide support material, wherein the shaped body has the shape of a cylinder having 3 or 4 hollow-cylindrical convexities, obtainable by extrusion of a catalyst precursor composition comprising vanadium, at least one alkali metal and sulfate on a silicon dioxide support material through the opening of an extrusion tool, wherein the opening of the extrusion tool has a cross section formed by 3 or 4 partly overlapping rings whose midpoints lie essentially on a circular line having a diameter of y, wherein the rings are bounded by an outer line lying on a circle having an external diameter x1 and an inner line lying on a circle having an internal diameter x2.