OP-II-3

PP-II-52MODELING OF THE CAUNTER-FLOW EXTRACTION REACTOROF DISPLACEMENTZueva Yu.N., Samoilenko N.G., Manelis G.B.Institute of Problems of Chemical Physics, Russian Academy of Sciences.Semenov Prospect 1, 142432, Moscow Region, ChernogolovkaE-mail: sam@icp.ac.ruThe stationary theory of the mass exchange of extraction processes developed tothe present time was based on the law of chemical balance and on the simplestrecord of mass conservation law and served as a basis for the development ofempirical method for the calculation of main parameters of the reactor at the givendegree of extraction. These methods were designed on the conception of thetheoretical step of contact and the volume expenses: phase’s ratio. Themathematical models of the stationary theory do not take into account thehydrodynamic pictures of the process. However, the question – does the flow ofphase’s effect on the efficiency of the extraction process and how - has no answer.The simple mathematical model is proposed for the counterflow extraction reactorwith the ideal displacement that takes into account the flow hydrodynamics of phasesin laminar approach. The analytic solution of the mathematical model is found.The physical model is simple. The given height A solution of substance A (phase1) is provided to the reactor with the given height from above. The linear rate of thisphase is given. The extragent B (phase 2) emerges in phase 1 in the form of dropswith the same size. The drop size does not change. The flow rate of this phase isknown.The analysis of the solution showed that the space distributions of phase Aconcentration significantly depended on the flow rate of the initial solution. At smallflow rates of phase 1 the upper part of the reactor works, at large rates –the lowerpart. The interval of rates exists, when he total reactor works completely.It was shown that at the given degree of extraction NOT at all flow rates of phase1 the stationary regimes were realized.428