Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Gernot Jäger

Christoph Gürtler

Hartmut Nefzger

Stefan Wershofen

Walter Leitner

Jens Langanke

Amgad Salah Moussa

Thomas Hamedinger

Swantje Behnken

Wolf Kloeckner

Giulio Lolli

Guenter Olf

Wolfgang Beckmann

Franz Beggel

Gesa Behnken

Guido Becker

Lukas Reisky

Natalie Bittner

Simon Klaffl

Andreas Ernst

Daniela Cozzula

Ivonne Görtz

Andreas Damm

Hasan Akyildiz

Jamaleddine Sassi

Thomas Ernst MÜLLER

Matthias Leven

The present invention relates to new urethanases for the enzymatic breakdown of polyurethanes and to an enzymatic process for the complete breakdown of polyurethanes into defined monomers.

Urethanases for the enzymatic degradation of polyurethanes

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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Cologne, Germany

Gernot Jäger