Simulation of Extraction Process in Dual-Flow Countercurrent Extraction

Hideyuki Nishizawa, Tomoko Shoji, Sakiko Okimura, Yoshihiro Abe

Research output: Contribution to journalArticlepeer-review


In the extractive purification of commercial glycyrrhizin (about 90% in purity) with dual-flow countercurrent extraction, the extractive recovery of an impurity in the sample was wrongly estimated by a reported calculation method. To investigate the cause, we simulated the extractive separation of the impurity from glycyrrhizin by dual-flow countercurrent extraction. If one used the reported calculation method, the extraction recoveries of the impurity into the organic phase were calculated as 40.6% or as 99.3%, on two different assumptions: (1) the distribution ratio of the impurity changed depending on its concentration, or (2) it varied with the concentration of glycyrrhizin in the extraction apparatus. The experimental results (99.1% recovery of the impurity in the organic phase) agreed with the calculation based on the latter assumption. With the calculation method, the distribution map of the components in the extraction column could be shown as well.

Original languageEnglish
Pages (from-to)109-112
Number of pages4
Journalanalytical sciences
Issue number1
Publication statusPublished - 1995
Externally publishedYes


  • Dual-flow countercurrent extraction
  • glycyrrhizin
  • liquid particle extraction
  • simulation

ASJC Scopus subject areas

  • Analytical Chemistry


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