Ultrasonic Intensification of Mass Transfer in Organic Acid Extraction

Abstract

The mechanism of ultrasonic extraction was discovered and analyzed in detail for the liquid membrane technique from the consideration of the specific features of the radial vibrations of a droplet of the dispersed phase placed into an immiscible continuous phase subjected to ultrasonic irradiation. Analytical formulas were derived for the rate of mass transfer as a function of the amplitude of acoustic pressure oscillations and the time of ultrasonic treatment of an extraction system. Conditions for achieving the maximum efficiency of the extraction of a substance under the stimulating effect of ultrasound were analyzed. A nonlinear equation was derived for the radial vibrations of a spherical droplet of the dispersed phase in an immiscible continuous phase under forcing in the form of acoustic pressure periodically changing with time. Experimental study of the dependence of sulfosalicylic acid distribution on time in an aqueous two-phase system with ultrasound shows good agreement of experimental results with the calculations performed.

Ultrasonic-Assisted Extraction and Structural Characterization of Chondroitin Sulfate Derived from Jumbo Squid Cartilage

“…The result indicates that UAE improved the mass transfer ability of molecules from solid phase to liquid phase, in addition to the extraction efficiency. This result can also be attributed to the assistance of the cavitation effect generated when the ultrasound acts on the extraction liquid [46,47]. Therefore, the UAE was used in the next stage for the optimization of the ChS extraction.…”

Modelling of the Erosive Dissolution of Metal Oxides in a Deep Eutectic Solvent—Choline Chloride/Sulfosalicylic Acid—Assisted by Ultrasonic Cavitation

“…The dissolution (or leaching) process of one or several components in an appropriate solvent is widely applied in technological production [1][2][3].One of the most efficient methods for the intensification of dissolution (leaching) of solid materials implies the use of ultrasound (US), which significantly reduces the process time and increases the product yield [4][5][6][7][8].Earlier works have studied the effect of ultrasound on the extraction of organic and inorganic substances [9][10][11][12][13][14]. It is known that ultrasonic action allows one to improve the leaching process with traditional reagents [15][16][17].…”