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:
Nov. 07, 2017
Filed:
May. 13, 2015
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Tim Blaschke, Ekeren, BE;
Ortmund Lang, Quirnbach, DE;
Marta Zajaczkowski-Fischer, Neuhofen, DE;
Marco Hartmann, Jockgrim, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/46 (2006.01); C07C 51/377 (2006.01); C07C 51/43 (2006.01);
U.S. Cl.
CPC ...
C07C 51/46 (2013.01); C07C 51/377 (2013.01); C07C 51/43 (2013.01);
Abstract
The invention relates to a process for dehydrating aqueous 3-hydroxypropionic acid to acrylic acid, wherein an aqueous mixture of 3-hydroxypropionic acid and oligomeric 3-hydroxypropionic acid is converted to acrylic acid in the liquid phase in a first step and aqueous acrylic acid is distilled out of the liquid phase, and the aqueous acrylic acid is separated by distillation into an acrylic acid-rich phase and a water-rich phase in a second step.