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:
Jul. 04, 2017
Filed:
Dec. 02, 2015
Basf SE, Ludwigshafen am Rhein, DE;
Yong Liu, Limburgerhof, DE;
Martin Dieterle, Ludwigshafen, DE;
Nicolai Tonio Woerz, Darmstadt, DE;
Andrei-Nicolae Parvulescu, Ruppertsberg, DE;
Michael Lejkowski, Neckargemuend, DE;
Johannes Lieberknecht, Limburgerhof, DE;
Christian Walsdorff, Ludwigshafen, DE;
Kazuhiko Amakawa, Mannheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for preparing acrylic acid from acetic acid and formaldehyde, which comprises (a) provision of a stream Scomprising acetic acid and formaldehyde, where the molar ratio of acetic acid to formaldehyde in the stream Sis in the range from 0.5:1 to 2:1; (b) contacting of the stream Swith an aldol condensation catalyst comprising vanadium, phosphorus and oxygen to give a stream Scomprising acrylic acid, where, in (b), the space velocity WHSV is in the range from 0.35 to 7.0 kg/kg/h.