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:
Aug. 29, 1978
Filed:
Oct. 07, 1975
Applicant:
Inventors:
Heinz Engelbach, Limburgerhof, DE;
Richard Krabetz, Kirchheim, DE;
Gerd Duembgen, Dannstadt-Schauernheim, DE;
Carl-Heinz Willersinn, Ludwigshafen, DE;
Walter Frey, Ludwigshafen, DE;
Ulrich Lebert, Ludwigshafen, DE;
Fritz Thiessen, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; B01D / ;
U.S. Cl.
CPC ...
2605 / ; 2605 / ; 2605 / ; 55 46 ; 203 42 ; 203 49 ; 203D / ;
Abstract
In the oxidation of propylene and/or acrolein, high-boiling or non-volatile byproducts are separated from the solvents used for absorbing the acrylic acid by treating the said solvents laden with byproducts with the hot reaction gases in such amounts that the major portion of the solvents evaporates, the residual solvent containing a high percentage of said byproducts then being discarded or worked up.