Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Thomas Hamedinger

Amgad Salah Moussa

Gernot Jäger

Wolf Kloeckner

Guenter Olf

Swantje Behnken

Giulio Lolli

Wolfgang Beckmann

Guido Becker

Gernot Jager

Hasan Akyildiz

Ivonne Görtz

Simon Klaffl

Andreas Damm

Amgad-Salah Moussa

Gernot JÄGER

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.

Method for producing aminobenzoic acid or an aminobenzoic acid derivative

The present invention relates to the production of o-aminobenzoic acid from fermentable substrates using yeast cells.

Process for the production of ortho-aminobenzoic acid and/or aniline from fermentable substrate using recombinant yeast

The present invention relates to a process for preparing aminobenzoic acid or an aminobenzoic acid conversion product, comprising the steps of: (I) providing an aqueous solution of aminobenzoic acid using a fermentation process; (II) adsorbing aminobenzoic acid; (III) desorbing aminobenzoic acid at a pH in the range from &#x2212;0.8 to 3.0, preferably &#x2212;0.5 to 3.0, more preferably 0.1 to 3.0, very preferably 0.5 to 2.5, very exceptionally preferably 1.0 to 2.0; (IV) obtaining the aminobenzoic acid from the desorbate obtained in step (III); (V) optionally further converting the aminobenzoic acid obtained in step (IV) to an aminobenzoic acid conversion product.

Process for preparing aminobenzoic acid or an aminobenzoic acid conversion product

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.

Method for producing aniline or an aniline conversion product

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Leverkusen, Germany

Thomas Hamedinger