Purification of organic acids by chromatography with strong anionic resins: Investigation of uptake mechanisms

International audience; Bio-based organic acids are promising renewable carbon sources for the chemical industry. However energy-consuming purification processes are used, like distillation or crystallization, to reach high purities required in some applications. That is why preparative chromatography was studied as an alternative separation technique. In a previous work dealing with the purification of lactic, succinic and citric acids, the Langmuir model was insufficient to explain the elution profiles obtained with a strong anionic resin.Consequently the Langmuir model was coupled with a usual ion-exchange model to take into account the retention of their conjugate bases (