Abstract This article focuses on the experimental work supported by theoretical model of the multicomponent mass transfer during extraction driven by spontaneous interfacial convection (SIC). The regularities of individual and joint unidirectional and reciprocal mass transfer of components with different surface-active properties in the benzene-water extraction system at a flat phase interface are considered. The article demonstrates that both the diffusion and convective hydrodynamics of the flow affect the intensity of unidirectional and counter-mass transfer of the components under the conditions of SIC. Marangoni instability at the interface causes local convection, which enhances the mass transfer rate considerably. Experimental studies have shown that the joint unidirectional mass transfer of acetic acid and iodine from organic phase to aqueous phase under the conditions of SIC can be characterised by an increase in the iodine mass transfer coefficient in comparison with its individual mass transfer. It has found that with the acetic acid the unidirectional mass transfer of iodine can be increased by more than 20 times compared to its mass transfer without acid. However in case of counter-transfer of acetic acid and iodine, both the acetic acid as well as iodine mass transfer coefficients decrease compared to their individual mass transfer situations. The experimental data are in accord with the theoretical justification. A simplistic semi empirical theoretical model is developed for joint mass transfer, to estimate the coefficient of mass transfer of the components. The satisfactory convergence of the experimental and calculated data are shown.

中文翻译：

---

液-液萃取系统中与自发界面对流相关的两种组分的联合传质

摘要 本文重点介绍了由自发界面对流 (SIC) 驱动的萃取过程中多组分传质理论模型支持的实验工作。考虑了苯-水萃取系统中不同表面活性组分在平面相界面上单独和联合单向和互易传质的规律。文章证明了流动的扩散和对流流体动力学都会影响 SIC 条件下组分的单向和反传质强度。界面处的 Marangoni 不稳定性导致局部对流，从而显着提高传质速率。实验研究表明，在 SIC 条件下，乙酸和碘从有机相到水相的联合单向传质可以通过与单独传质相比碘传质系数的增加来表征。已经发现，与没有酸的情况相比，使用乙酸可以将碘的单向传质提高 20 倍以上。然而，在醋酸和碘的反向转移的情况下，醋酸和碘的传质系数与其各自的传质情况相比都会降低。实验数据与理论论证相符。为联合传质开发了一个简单的半经验理论模型，估计组分的传质系数。显示了实验数据和计算数据的令人满意的收敛性。