从聚合物中萃取杂质过程模拟

Modeling of Extraction of Organic Compound from Polymers

建立了在萃取器中从粒状聚合物中脱除低聚合物过程的数学模型。模型考虑了低聚物在聚合物颗粒中的扩散效应，颗粒和液相的轴向扩散以及界面的平衡关系，模型参数采用Marquardt非线性回归方法拟合文献数据求得。数值模拟了液－固萃取传质特性。模型可用于间歇或连续萃取过程的分析和设计。

The desorption profiles of organic compounds from polymers using water were modeled. The model accounts for effective diffusion of the organics in the polymer pearls, axial dispersion of the pellets and liquid phase and distribution equilibrium at the interface. The model parameters were obtained by Marquardt method using literature data. Numerical simulations are investigated to predict the behavior of the liquid-solid mass transfer. The model may be used for analysis and design of extraction processes.