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:
Aug. 23, 2005
Filed:
Jun. 28, 2002
Silke Berndt, Mannheim, DE;
Klaus Joachim Müller-engel, Stutensee, DE;
Götz-peter Schindler, Mannheim, DE;
Frank Rosowski, Mannheim, DE;
Jochen Petzoldt, Mannheim, DE;
Silke Berndt, Mannheim, DE;
Klaus Joachim Müller-Engel, Stutensee, DE;
Götz-Peter Schindler, Mannheim, DE;
Frank Rosowski, Mannheim, DE;
Jochen Petzoldt, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process prepares methacrylic acid from isobutane by subjecting isobutane to a partial catalytic dehydrogenation in the gas phase and charging an oxidation zone with the isobutenic product gas mixture after the components other than isobutane and isobutene have been substantially removed from the product gas mixture. The oxygen required to charge the oxidation zone is introduced accompanied by nitrogen.