Abstract：Supercritical fluid extraction technology is a high-separation technology, its applications and researchs are more and more widely. Among them, the supercritical CO2 fluid extraction of natural plant oil already become a hot research topic. Among the supercritical fluid extraction of seed oil, the research of mass transfer was relatively small. This article contains two aspects: one is the P-V-T data experiments of CO2,it is related to high-pressure phase equilibrium knowledge.And described supercritical CO2 fluid extraction of natural plant oil in the area of mass profile, which listed several important theoretical model of mass transfer ; Second, establish a new physical model - column reduced heart model,also base on this physical model , a mathematical model was established.And take tea seed oil as a example, the literature search data to validate the model, the calculation for the full value of the extraction time experimental value is closer, so the prediction of the model test meets the forecast demand while the yield of extraction time for the prediction and experimental values deviate from the larger, demanding further experimental determination of reliable physical data to refine the model.
Key words: supercritical CO2 fluid extraction；P-V-T data；mass transfer model
