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Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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Steroid extraction in a microchannel system--mathematical modelling and experiments.

Polona Znidarsic-Plazl1, Igor Plazl

  • 1Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, SI-1000 Ljubljana, Slovenia.

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Microchannel extraction efficiently separates progesterone and 11alpha-hydroxyprogesterone. This method shows promise for integrated corticosteroid production systems using Rhizopus nigricans.

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Area of Science:

  • Biochemical Engineering
  • Separation Science
  • Microfluidics

Background:

  • Corticosteroid production involves progesterone biotransformation.
  • Efficient extraction of reactants and products is crucial for bioprocesses.

Purpose of the Study:

  • To investigate continuous ethyl acetate extraction of progesterone and 11alpha-hydroxyprogesterone in a microchannel.
  • To develop and validate a mathematical model for microreactor performance prediction.

Main Methods:

  • Continuous and batch extraction experiments in a microchannel.
  • Development of a 3D mathematical model incorporating convection and diffusion.
  • Numerical solution using non-equidistant finite differences.

Main Results:

  • High extraction yields and efficient phase separation were achieved.
  • Excellent agreement between experimental data and model predictions without fitting.
  • Demonstrated feasibility of microscale extraction for biotransformation.

Conclusions:

  • Microscale extraction units are effective for progesterone and 11alpha-hydroxyprogesterone recovery.
  • The developed model accurately predicts microreactor performance.
  • Microextraction shows potential for integrated corticosteroid production systems.