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:
Jul. 07, 2020
Filed:
Jun. 27, 2017
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Gernot Jäger, Köln, DE;
Thomas Hamedinger, Leverkusen, DE;
Giulio Lolli, Köln, DE;
Amgad Salah Moussa, London, GB;
Guenter Olf, Zülpich, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/68 (2006.01); C07C 209/78 (2006.01); C12P 13/00 (2006.01);
U.S. Cl.
CPC ...
C07C 209/68 (2013.01); C07C 209/78 (2013.01); C12P 13/001 (2013.01);
Abstract
The invention relates to a method for producing aniline or products that are obtained by further chemical reaction of aniline (aniline derivatives), involving decarboxylation of aminobenzoic acid, particularly ortho-aminobenzoic acid, in which one portion of the previously formed crude aniline is recirculated in the decarboxylation step. The aminobenzoic acid is obtained enzymatically or chemically, preferably enzymatically.