Hydrodynamic and mass transfer have been investigated under a condition with solute in 13.2 cm inside diameter and 120 cm height column with rotating blade impellers. The hydrodynamic was expressed by the characteristic velocity, which was obtained from Logsdail's correlation equation.
Mass transfer coefficient based on the continuous phase, and peclet number that is needed in order to study axial mixing effect were calculated by the application of the differential backmixing model.
The variables in this work were impeller size, impeller rotor speed, compartment height and flow rates of the continuous phase. The system used in this experiment was a ternary of water-acetone-cyclohexane.
The characteristic velocity decreases with rpm and the impeller size, and increases with the compartment height. The relation was expressed by the following empirical equation:
$\bar{U}_O = 19.3 N^{-2.1} (z_c/d_c)^{0.83}(d_c/d_I)^{2.19}$
The mass transfer coefficient increases with rpm and the impeller size, and decreases with the compartment height. The relation was expressed by the empirical equation:
$(K_{OC}aL/\bar{U}_d) =13.2N^{1.33} (z_c/d_c)^{-0.93} (d_I/d_c)^{0.74} (\bar{F}_c/\bar{F}_d)^{-0.78}$
