Interphase Distribution of Caffeine and Coumarin in Extraction Systems with Polyethylene Glycol and Sodium Sulfate

Ultrasonic Intensification of Mass Transfer in Organic Acid Extraction

“…The results of extraction obtained in experiments with and without ultrasound were compared with the calculated data described by Equation (14). Based on this formula for the time-varying density δn(τ) of the substance being extracted from a droplet (or simultaneously from a multitude of droplets), the following equation can be written:…”

“…As can be seen from Figure 2, the vibration amplitude of the droplet surface resonantly increases in approaching the frequency of natural oscillations, and the width of resonance depends on pump amplitude. However, for the practical use of Equation (14), it is sufficient to obtain the value of the vibration amplitude in three limiting cases [36]: (1) Ω << ω, (2) Ω >> ω, and (3) Ω ≈ ω.…”

“…Through the ages, people successfully used various extraction methods in one or another form to improve their wellbeing by increasing the quality of the implementation of the developing capabilities of chemistry and physics throughout the entire period of human civilized existence [1]. In particular, the problems of the recovery of metals from different substances [2][3][4][5][6] and the extraction of other chemical compounds from liquids [7][8][9][10][11][12][13][14][15] are constantly enriched with new solutions, the corresponding schemes of practical implementation, and the possibilities of using the correlating achievements from related branches of science. This includes the use of ultrasound, which can have a substantial effect on the results of various experiments from the purification of soil from petroleum products [16] to metal hardening [17].…”

Study of caffeine and coumarin extraction kinetics in an aqueous two-phase system based on polyethylene glycol 1500

“…Today, numerous works are aimed at the development of environmentally friendly, effective methods for the extraction of organic compounds that are not inferior to classical extraction systems based on toxic and harmful organic solvents [10][11][12]. The aqueous two-phase system is of great interest as an alternative extraction system, which is eco-friendly, easy to utilize, efficient and cost-effective [13][14][15][16][17]. Yazdabadi A et al established the regularities of caffeine extraction in the system based on tetrabutilphosphonium bromide and sorbitol [18].…”

A Deep Eutectic Solvent Based on Choline Chloride and Sulfosalicylic Acid: Properties and Applications

“…Their introduction into various production processes, such as desulfurization [13] and biodiesel synthesis [14], is justified from both economic and environmental standpoints. In the chemistry and technology of liquid-liquid extraction, extractants based on ionic liquids [15][16][17][18][19], water-soluble polymers [20][21][22][23][24][25], and deep eutectic solvents [26,27] have been actively developed in recent years. In solid-liquid extraction, there has been a shift in research areas towards green chemistry.…”