PROCESS FOR PREPARING AMINOBENZOIC ACID OR AN AMINOBENZOIC ACID CONVERSION PRODUCT

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 -0.8 to 3.0, preferably -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. 本发明涉及一种制备氨基苯甲酸或氨基苯甲酸后续产物的方法，包括以下步骤：（I）使用发酵方法提供氨基苯甲酸水溶液；（II）吸附氨基苯甲酸；（III）在-0.8至3.0，优选-0.5至3.0，特别优选0.1至3.0，非常优选0.5至2.5，格外非常特别优选1.0至2.0的pH值下解吸氨基苯甲酸；（IV）从步骤（III）中得到的解吸质中获得氨基苯甲酸；（V）任选地使步骤（IV）中获得的氨基苯甲酸进一步反应得到氨基苯甲酸后续产物。