Supercritical fractionation is a unit operation which allows separation and purification of liquid mixtures and is of particular interest for low-volatility and thermosensitive mixtures. This process is an environmentally friendly alternative to conventional methods which use organic solvents or require rather high temperature, and it presents a great potential for a wide range of industrial applications.

In this work, the scientific literature addressing the supercritical fractionation and more particularly the flooding in gravity-driven counter-current packed columns is investigated. The compilation of experimental data, approximately 400 flooding points, measured for compounds of different natures and for various packing materials and operating conditions, allowed to propose a new correlation for the prediction of flooding. Such correlation, representing the dimensionless capacity factor as a function of the flow parameter, commonly used for gas-liquid systems, constitutes a useful tool for a more reliable sizing and design of fractionation columns involving a supercritical fluid.

超临界分馏是一种允许分离和纯化液体混合物的单元操作，尤其适用于低挥发性和热敏混合物。该过程是使用有机溶剂或需要相当高温度的传统方法的环保替代方法，并且在广泛的工业应用中具有巨大的潜力。

在这项工作中，研究了关于超临界分馏，更特别是重力驱动逆流填料塔中的驱油的科学文献。对不同性质的化合物以及各种填料和操作条件下测量的大约 400 个溢流点的实验数据的汇编，允许提出用于预测溢流的新关联。这种相关性将无量纲容量因子表示为流量参数的函数，通常用于气液系统，构成了一种有用的工具，可用于更可靠地确定涉及超临界流体的分馏塔的尺寸和设计。