<b>Modeling the Process of Extraction of Oilseed Material in a Unit with Critical Carbon Dioxide</b> The mathematical model of process of extraction of an oilseed material in the units with critical carbonic gas was developed On the basis of this model researches are conducted and schedules of change of concentration of oil in firm both liquid phases and decrease of concentration of oil in quasilayers are gained at different coefficients of diffusion, and also resulted comparison of the gained results to experimental data System, analysis, modeling, quasi-layer, diffusion, extraction, extraction unit, oilseed material, carbon dioxide, supercritical condition 50-61 Issue-6 Volume-1 K.Gafurov | A.Artikov | D. Xasanov | B.Mukhamadiey