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:
Oct. 03, 2017
Filed:
Aug. 03, 2016
Basf SE, Ludwigshafen, DE;
Tobias Korn, Goennheim, DE;
Till Blum, Schifferstadt, DE;
Travis Carline, Lake Jackson, TX (US);
Christopher Fuchs, Angleton, TX (US);
Darryl Welch, Lake Jackson, TX (US);
Peter Zurowski, Landau, DE;
Volker Schliephake, Schifferstadt, DE;
Steffen Rissel, Kirchheim, DE;
Thorsten Friese, Hong Kong, CN;
Ulrich Jaeger, Roemerberg, DE;
Sylke Haremza, Neckargemuend, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for production of acrylic acid includes preparing a product gas mixture by a catalytic gas-phase oxidation of a Cprecursor; cooling and contacting the cooled product gas mixture in an absorption column having at least two cooling loops in countercurrent with an absorbent to obtain an absorbate A, containing the absorbent and absorbed acrylic acid; condensing a high boiler fraction of the product gas mixture in a first cooling loop; condensing a low boiler fraction of the product gas mixture in a second cooling loop; maintaining a temperature of the absorbate A in the second cooling loop at a value of at least 56° C.; removing an acid water stream comprising glyoxal from the absorption column at a side take-off located above the second cooling loop; and removing a stream F of absorbate A from the absorption column at a side take-off, located at a height of the absorption column between the first cooling loop and the second cooling loop.