Features of the extraction of essential oils from plant raw material in the presence of surface-active agents

Abstract

It has been established that the influence of surface-active agents (SAAs) on the extraction of essential oils (EOs ) is connected with a fall in the surface tension of water, which facilitates the process of steeping, wetting, and swelling of plant raw material and also the solubilization of the EOs in micellar solutions of SAAs.The main method of isolating essential oils (EOs) from plant raw materials is steam distillation. In view of this, it is necessary to develop scientific principles of regulation of the processes at the phase-separation boundaries of dispersions of medicinal plants and solvents. Nontraditional methods based on the use of liquefied gases [1, 2], wide-range frequency vibrations, electric and magnetic fields, impulses, etc. [3, 4] are being used to solve this problem. In the present paper we give results on the possibility regulating the properties of the surface of a dispersion of plant origin and the structure of a solvent (water) with the aid of additions of surface-active agents (SAAs) in order to intensify the extraction of EOs. where AX is the displacement of the meniscus in a calibrated capillary; D is the diameter of the calibrated capillary (1.18--2.28 ram); D o = 37 mm is the diameter of the tube into which the sample powder was charged; and n is the porosity of the raw material.It can be seen that with a rise in the concentration of the SAA the depth of penetration of the raw material increased.A. Sultanov

Feststoffextraktion

“…In ähnlicher Weise trifft das auch für die Phytoextraktion zu. Im hydrophoben Inneren von Mizellen sind öllösliche Komponenten gut löslich [12,13]. Eine geeignete Auswahl des Tensids macht dann eine ¹Trübpunktextraktionª möglich [14].…”