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. 09, 2021
Filed:
Nov. 17, 2016
Covestro Deutschland Ag, Leverkusen, DE;
Gernot Jäger, Cologne, DE;
Wolfgang Beckmann, Berlin, DE;
Amgad Salah Moussa, Bad Säckingen, DE;
Guenter Olf, Zülpich, DE;
Guido Becker, Krefeld, DE;
Hasan Akyildiz, Duisburg, DE;
Andreas Damm, Wermelskirchen, DE;
Thomas Hamedinger, Leverkusen, DE;
Wolf Kloeckner, Cologne, DE;
Swantje Behnken, Sacramento, CA (US);
Covestro Deutschland AG, Leverkusen, DE;
Abstract
The invention relates to a method for producing aminobenzoic acid or a aminobenzoic acid derivative via the fermentation of a suitable raw material under the influence of suitable microorganisms and obtaining a fermentation broth containing aminobenzoate and/or aminobenzoic acid. In particular, the invention relates to the step of obtaining the aminobenzoic acid from the fermentation broth, wherein the crystallisation of aminobenzoic acid is carried out via a simple one-stage acid treatment in the presence of seed crystals. The aminobenzoic acid crystallised in this simple manner can be easily separated from the mother liquor, further cleaned if necessary, and then supplied to the different applications.