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:
Sep. 15, 2009
Filed:
Oct. 17, 2007
Joerg Heilek, Bammental, DE;
Klaus Joachim Mueller-engel, Stutensee, DE;
Martin Dieterle, Ludwigshafen, DE;
Armin Diefenbacher, Freisbach, DE;
Joerg Heilek, Bammental, DE;
Klaus Joachim Mueller-Engel, Stutensee, DE;
Martin Dieterle, Ludwigshafen, DE;
Armin Diefenbacher, Freisbach, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for separating acrylic acid and benzoic acid present in the product gas mixture of a partial oxidation to acrylic acid, in which the acrylic acid and the benzoic acid are first converted to a liquid phase, constituents having a lower boiling point than benzoic acid and acrylic acid are removed therefrom by thermal separating processes, and the acrylic acid is removed by crystallization from the remaining liquid phase.