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:
Jan. 08, 2019
Filed:
Feb. 19, 2015
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Assignee:
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C12P 7/40 (2006.01); C12P 13/00 (2006.01); C07C 209/68 (2006.01); C07C 209/78 (2006.01); C07C 209/84 (2006.01); C07C 263/10 (2006.01);
U.S. Cl.
CPC ...
C07C 263/10 (2013.01); C07C 209/68 (2013.01); C07C 209/78 (2013.01); C07C 209/84 (2013.01); C12P 7/40 (2013.01); C12P 13/00 (2013.01); C12P 13/001 (2013.01);
Abstract
The invention relates to a method for producing aniline, comprising the steps of: a) providing o-aminobenzoate, wherein said o-aminobenzoate comprises anthranilate anion and a suitable cation, b) converting said anthranilate anion to aniline by thermal decarboxylation in the presence or absence of a catalyst, c) extracting the aniline produced in step b) in an organic solvent at least once, and d) purifying the aniline produced in steps b) and c) by distillation, wherein said distillation produces aniline and a water phase.