| abstract |
The present invention relates to a method for preparing aminobenzoic acid or a subsequent product of aminobenzoic acid, comprising the following steps: (I) using a fermentation method to provide an aqueous solution of aminobenzoic acid; (II) adsorbing aminobenzoic acid; (III) at -0.8 to 3.0 , preferably -0.5 to 3.0, particularly preferably 0.1 to 3.0, very preferably 0.5 to 2.5, very particularly preferably 1.0 to 2.0 pH values desorb aminobenzoic acid; (IV) obtained from the desorbed mass obtained in step (III) aminobenzoic acid; (V) optionally further reacting the aminobenzoic acid obtained in step (IV) to obtain a subsequent product of aminobenzoic acid. |