Interfacial properties such as interfacial mass transfer are essential for the design and optimization of industrial separation processes. In this work we investigate the interfacial behavior of the two quaternary systems water + toluene + ethanol + acetone and water + toluene + ethanol + tetrahydrofuran and the relation between interfacial enrichment and mass transfer. The Concentration Gradient Theory (CGT) is combined with the Koningsveld-Kleintjens (KK) model to calculate interfacial tension and interfacial concentration profiles. By expanding a recent study of ternary systems with ethanol, acetone or tetrahydrofuran as transferring components we demonstrate that interfacial mass transfer in quaternary systems can be modeled with CGT + KK in good accordance to experimental data by adjusting a single additional binary mobility coefficient. Moreover, the present study indicates a hint on a link between interfacial enrichment and interfacial mass transfer.

界面特性如界面传质对于工业分离过程的设计和优化至关重要。在这项工作中，我们研究了两个四元体系水 + 甲苯 + 乙醇 + 丙酮和水 + 甲苯 + 乙醇 + 四氢呋喃的界面行为以及界面富集与传质之间的关系。浓度梯度理论 (CGT) 与 Koningsveld-Kleintjens (KK) 模型相结合，以计算界面张力和界面浓度分布。通过扩展最近对乙醇、丙酮或四氢呋喃作为传递组分的三元系统的研究，我们证明了四元系统中的界面传质可以通过调整单个额外的二元迁移系数，用 CGT + KK 很好地模拟实验数据。