A model for continuous sample feed and separation with counter-current chromatography based on elution-extrusion mode...

Area of Science:

• Analytical Chemistry
• Separation Science
• Chemical Engineering

Background:

• Continuous separation techniques are crucial for efficient isolation of compounds.
• Counter-current chromatography (CCC) offers advantages for preparative separations.
• Developing predictive models enhances the optimization of CCC processes.

Purpose of the Study:

• To establish a theoretical model for continuous separation using counter-current chromatography (CCC) based on the elution-extrusion mode.
• To experimentally validate the model using the separation of luteolin/baicalein.
• To apply the model for the prediction and isolation of oleuropein from olive leaves.

Main Methods:

• Development of a theoretical model incorporating velocity and volume aspects of chromatographic separation.
• Experimental verification using binary mixture separation (luteolin/baicalein).
• Application of the model for continuous separation of oleuropein from olive leaves using optimized solvent systems and high sample loading.

Main Results:

• The theoretical model accurately described chromatographic separation behavior.
• The method demonstrated significant advantages for binary mixture separation.
• Continuous separation of oleuropein yielded 86.42% purity within 80 minutes with a large sample loading (48 ml).

Conclusions:

• The established theoretical model provides robust technical support for predicting chromatographic behavior and optimizing operating parameters in CCC.
• The elution-extrusion mode CCC is highly effective for continuous separation and preparation.
• This approach holds significant promise for large-scale industrial separation and purification processes.