Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Guenter Olf

Amgad Salah Moussa

Gernot Jaeger

Wolf Kloeckner

Gernot Jäger

Thomas Hamedinger

Swantje Behnken

Giulio Lolli

Wolfgang Beckmann

Guido Becker

Franz Beggel

Jorgen Magnus

Andreas Damm

Hasan Akyildiz

Simon Klaffl

Jung-Won Youn

Mohammad Yalfani

Georg Sprenger

Simon Klaff

Gernot JÄGER

Amgad-Salah Moussa

The invention relates to a method for producing aminobenzoic acid or an aminobenzoic acid derivative using a fermentation process, in which (I) the aminobenzoic acid formed in the fermentation broth obtained by the fermentation is bound in part, or as much as possible based on the solubility equilibrium, as insoluble calcium-aminobenzoate, said insoluble calcium-aminobenzoate is then (II) either isolated as such or in a mixture with the microorganism used in the fermentation and transitioned into a water soluble form, while separating an insoluble calcium salt which is different from the calcium-aminobenzoate, and then (III) by introducing carbon dioxide under pressure into the aqueous solution from the precipitated calcium salt has been released, aminobenzoic acid is precipitated.

Method for producing aminobenzoic acid or an aminobenzoic acid derivative product

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 invention provides a recombinant microbial host cell capable of converting a raw material comprising a fermentable carbon substrate to o-aminobenzoate biologically. The invention further provides a method for producing aniline, comprising the steps of: a) producing o-aminobenzoate by fermentation of a raw material comprising at least one fermentable carbon substrate using the recombinant microbial host cell of the capable of converting said raw material comprising at least one fermentable carbon substrate to o-aminobenzoate biologically, wherein said o-aminobenzoate comprises anthranilate anion, b) converting said o-aminobenzoate from said anthranilate anion to anthranilic acid by acid protonation, c) recovering said anthranilic acid by precipitation or by dissolving in an organic solvent, and d) converting said anthranilic acid to aniline by thermal decarboxylation in an organic solvent.

Recombinant strain producing O-aminobenzoate and fermentative production of aniline from renewable resources via 2-aminobenzoic acid

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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Zülpich, Germany

Guenter Olf