Research on aspects of the extraction kinetics of metabolites of Сarlina acaulis while mixing

Abstract

This study reports the features of the mass transfer kinetics during the extraction of phenolic compounds and flavonoids from the Carlina acaulis roots. The extraction process of target compounds was optimized and the mathematical model was selected, which implies that the mass transfer of target compounds occurs during the extraction of the solid phase (plant cells) into the liquid phase (extractant). The most effective hydrodynamic conditions for the production of phenolic compounds and flavonoids were determined. An experimental verification of the kinetic equation was carried out by extracting the target compounds from the studied object of various sizes in a vessel with a stirrer using 40% and 70% ethanol as an extractant. The results of the experiment indicated that the target compounds extraction process, namely phenolic compounds and flavonoids from the Carlina acaulis roots, proceeds more efficiently under stirring conditions when using particles with a diameter of 2 mm and 70% ethanol as an extractant. The experimental data are in good agreement with the theoretically calculated results, which confirms the appropriateness of using the selected mathematical model. Studies of the kinetics of Carlina acaulis roots extraction process will allow minimizing the losses of target compounds, and improving the extraction process and the quality of final product.