SEPARATION OF CITRIC FROM GLUCONIC ACID IN the fermentation broth UNDER USE A WEAK OR STRONG ALKALINE ANIONENAUSTAUSCHHARZADSORPTIONSMITTEL

摘要

The citric acid is separated from a fermentation broth containing gluconic acid by an adsorbent which comprises a water-insoluble macroreticular or gel-type strongly or weakly basic anion exchange resin has the quaternary or tertiary functional groups wherein said anion exchange resin has a crosslinked acrylic or Styrenharzmatrix, and a desorbent used, comprising water or dilute sulfuric acid. The pH of the feed means is below the first ionisation constant (PKAL) maintaining the citric acid with the aim of being able to maintain the selectivity.