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Polyphenol Liquid-Liquid Extraction Process Development Using NRTL-SAC.

Marcelo Silva1, Joan Cortada García1, Marcel Ottens1

  • 1Delft University of Technology, Department of Biotechnology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands.

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Summary
This summary is machine-generated.

This study optimized liquid-liquid extraction (LLE) for polyphenol purification from fermentation broths. It identified effective solvents and solvent mixtures for high polyphenol recovery and purity.

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Area of Science:

  • Biochemical Engineering
  • Separation Science
  • Process Chemistry

Background:

  • Polyphenols are valuable compounds found in fermentation broths.
  • Effective purification strategies are crucial for isolating specific polyphenols.
  • Liquid-liquid extraction (LLE) offers a promising method for polyphenol recovery.

Purpose of the Study:

  • To systematically study the partition behavior of key polyphenols (naringin, naringenin, p-coumaric acid, trans-resveratrol) in various solvents and solvent mixtures.
  • To evaluate the applicability of the NRTL-SAC model for predicting polyphenol partitioning.
  • To propose optimized LLE downstream processing schemes for specific polyphenol purification scenarios.

Main Methods:

  • Experimental measurement of polyphenol partition coefficients in diverse solvent systems.
  • Application of the NRTL-SAC thermodynamic model to describe and predict polyphenol partitioning.
  • Estimation of NRTL-SAC molecular descriptors using existing literature solubility data.

Main Results:

  • The NRTL-SAC model achieved a minimum average absolute deviation of 40% in predicting activity coefficients.
  • Specific solvent systems were identified as suitable for the selective extraction of target polyphenols.
  • Successful downstream process schemes were proposed for recovering trans-resveratrol and purifying naringenin and trans-resveratrol.

Conclusions:

  • Liquid-liquid extraction, guided by thermodynamic modeling, is an effective strategy for purifying polyphenols from complex fermentation matrices.
  • The NRTL-SAC model provides valuable insights for solvent selection in polyphenol recovery.
  • Optimized LLE processes can efficiently separate hydrophobic polyphenols from hydrophilic impurities.