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:
Nov. 05, 2002
Filed:
Aug. 17, 2001
Applicant:
Inventors:
Thomas Lehmann, Langenselbold, DE;
Rolf Schneider, Gründau, DE;
Christoph Weckbecker, Gründau-Lieblos, DE;
Elisabeth Dunach, Villeneuve Loubet, FR;
Sandra Olivero, Nice, FR;
Assignee:
Degussa AG, Düsseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B 3/00 ;
U.S. Cl.
CPC ...
C25B 3/00 ;
Abstract
A process for the production of 2-hydroxy-4-methylmercaptobutyric acid (MHA) by electrochemical carboxylation of 3-methylmercapto-propionaldehyde in an undivided electrolytic cell containing a sacrificial anode, in an aprotic solvent in the presence of a supporting electrolyte. Preferred anode/cathode combinations are Mg/Mg and Mg/carbon. MHA is obtainable in a high yield.