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:
Jan. 19, 2016
Filed:
Sep. 16, 2014
Basf SE, Ludwigshafen, DE;
Cathrin Alexandra Welker-Nieuwoudt, Birkenheide, DE;
Cornelia Katharina Dobner, Ludwigshafen, DE;
Holger Borchert, Offstein, DE;
Ulrich Hammon, Mannheim, DE;
Josef Macht, Antwerp, BE;
Andrey Karpov, Cranford, NJ (US);
Christian Walsdorff, Ludwigshafen, DE;
BASF SE, Ludwigshafen, DE;
Abstract
What is described is a catalyst for preparation of an α,β-unsaturated carboxylic acid by gas phase oxidation of an α,β-unsaturated aldehyde, comprising a shaped support body with an active composition applied thereto, wherein the active composition coverage q is at most 0.3 mg/mm, where Q is the active composition content of the catalyst in % by weight and Sis the specific geometric surface area of the shaped support body in mm/mg. Also described are a process for preparing the catalyst and a process for preparing an α,β-unsaturated carboxylic acid by gas phase oxidation of an α,β-unsaturated aldehyde over a fixed catalyst bed comprising a bed of the catalyst. The catalyst, with constantly high conversion of acrolein, reduces overoxidation to COand increases the selectivity of acrylic acid formation.