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. 13, 2013
Filed:
Sep. 14, 2011
Stefanie Herzog, Berlin, DE;
Stefan Altwasser, Wachenheim, DE;
Markus Ottenbacher, Wilhelmsfeld, DE;
Frank Huetten, Mannheim, DE;
Annebart Engbert Wentink, Mannheim, DE;
Alexander Schaefer, Limburgerhof, DE;
Stefanie Herzog, Berlin, DE;
Stefan Altwasser, Wachenheim, DE;
Markus Ottenbacher, Wilhelmsfeld, DE;
Frank Huetten, Mannheim, DE;
Annebart Engbert Wentink, Mannheim, DE;
Alexander Schaefer, Limburgerhof, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for preparing acrylic acid from ethanol and formaldehyde, in which, in a reaction zone A, the ethanol is partially oxidized to acetic acid in a heterogeneously catalyzed gas phase reaction, the product gas mixture A obtained and a formaldehyde source are used to obtain a reaction gas input mixture B which comprises acetic acid and formaldehyde and has the acetic acid in excess over the formaldehyde, and the formaldehyde present in reaction gas input mixture B is aldol-condensed with acetic acid present in reaction gas input mixture B to acrylic acid under heterogeneous catalysis in a reaction zone B, and unconverted acetic acid still present along-side the acrylic acid target product in the product gas mixture B obtained is removed therefrom, and the acetic acid removed is recycled into the production of reaction gas input mixture B.