Key words: supercritical extraction, oil-bearing crop seeds, mathematical modeling
A simplified mathematical model of ground oil-bearing crop seeds extraction is developed. It is reduced to a hyperbolic system of two equations related to the main process characteristics: (a) oil concentration in the fluid in microscopic channels of the granular layer of seed particles and (b) a fraction of initial oil reserve extracted from particles. Corresponding task is solved analytically. The solution is shown to have a structure of a running wave propagating at a constant velocity. The applicability of the model to the simulation of real extraction processes is confirmed by testing based on available experimental data.