Process for the isolation of polyhydroxy cyclic carboxylic acids

   
   

This invention is directed to the use of crystallization acids, such as acetic, lactic and propionic acids, to obtain high purity polyhydroxyl cyclic carboxylic acids (PCCA) from low purity aqueous solutions. The preferred PCCA is shikimic acid and the preferred crystallization acid is acetic acid. The method according to the invention is particularly applicable to the isolation of shikimic acid from a fermentation broth.

Cette invention est dirigée vers l'utilisation des acides de cristallisation, tels que les acides acétiques, lactiques et propioniques, d'obtenir les acides carboxyliques cycliques de polyhydroxyl de grande pureté (PCCA) des solutés de basse pureté. Le PCCA préféré est acide shikimic et l'acide préféré de cristallisation est acide acétique. La méthode selon l'invention est particulièrement applicable à l'isolement de l'acide shikimic d'un bouillon de fermentation.

 
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