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:
Jan. 13, 1976
Filed:
Jul. 17, 1972
Applicant:
Inventors:
Gerd Duembgen, Dannstadt, DT;
Heinz Engelbach, Limburgerhof, DT;
Walter Frey, Mannheim, DT;
Richard Krabetz, Kirchheim, DT;
Ulrich Lebert, Ludwigshafen, DT;
Hermann Spitzl, Ludwigshafen, DT;
Fritz Thiessen, Ludwigshafen, DT;
Carl-Heinz Willersinn, Ludwigshafen, DT;
Assignee:
Badische Anilin- & Soda-Fabrik Aktiengesellschaft, Ludwigshafen (Rhine), DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
2605 / ; 203 63 ; 203 68 ; 2605 / ; 2605 / ;
Abstract
Acrylic acid practically devoid of water, acrolein, formaldehyde and acetic acid is obtained at particularly low cost by countercurrent scrubbing and quenching of the reaction gas formed in the catalytic oxidation of propylene and/or acrolein with a high-boiling, extremely hydrophobic solvent followed by processing of the extract.