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:
Oct. 13, 1987
Filed:
Aug. 08, 1986
Applicant:
Inventors:
Moustafa El-Chahawi, Troisdorf, DE;
Gunter Meyer, Troisdorf, DE;
Assignee:
Dynamit Nobel AG, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562450 ;
Abstract
From reaction solutions of carboxylic acids prepared by carbonylation with the aid of cobalt carbonyl catalysts, the cobalt of the catalyst is precipitated by the addition of at least equivalent amounts of monocarboxylic or dicarboxylic acids and neutralization with alkaline agents, in the form of a cobalt(II) salt of the added acid, and the carboxylic acid is completely recovered from the reaction solution by acidification.