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. 24, 2020
Filed:
Dec. 31, 2019
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Timo Stahl, Limeshain, DE;
Patrik Stenner, Hanau, DE;
Cornelia Borgmann, Frankfurt, DE;
Christian Renner, Gründau, DE;
Axel Ronneburg, Hanau, DE;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 277/08 (2006.01);
U.S. Cl.
CPC ...
C07C 277/08 (2013.01);
Abstract
The present invention pertains to a process for preparing guanidino acetic acid (GAA) from cyanamide and glycine in alkaline process solution, in which anionic impurities are removed from the process solution by electrodialysis.