The progress in kinetic models for oil solvent extraction based on Fick’s diffusion theory was reviewed. The establishment, modification and improvement of classic diffusion model were mainly elaborated and the features of classic diffusion model and some modification models were analyzed, including proportion instantaneous washing & diffusion model, simultaneous washing & diffusion model and diffusion after washing model. Then the applications of these models in oil solvent extraction were summarized so as to offer a reference for the study on kinetics and theory of oil solvent extraction. |