Algoritmo etapa a etapa para la simulación de cascadas de extracción en fase líquida aplicando el modelo de equilibrio
Sánchez-Correa, César Augusto | 2013-12-17
It is shown a stage-by-stage solution method for the group of mass balances, equilibrium relationships, sum of compositions and enthalpy equations (MESH equations) that represents the equilibrium model for a countercurrent multistage liquid-liquid extraction arrangement. The theoretical foundation is in thermodynamics: liquid-liquid equilibrium, isothermal flash, and adiabatic flash. The algorithm exceeds the scope of graphics and isothermal methods used in the study of extraction processes, which is applicable to very common typical situations: heat transfer by stage, adiabatic stages, and different temperatures in feed and solvent streams. The algorithm is illustrated in three examples, the first two in isothermal operation with three components (water, acetic acid and butyl acetate) and ten stages, and a third one more elaborated involving heat transfer with four components (water, acetic acid, butanol, butyl acetate) and fifteen stages.