The Experimental Study of Effective Parameters on Mean Drop Size in a Mixer-Settler

In this investigation, in order to study the effect of hydrodynamic parameters such as impeller speed and hold-up, two series of experiments have been performed with a single stage horizontal mixer-settler equipped with 2 four-blade impellers. in the first series, 15 experiments were carried out with toluene/water system and in the second series, 60 experiments were carried out with toluene/acetone/water system. results show that in both systems, when the hold-up is constant, the mean drop size decreases with increasing impeller speed and when the impeller speed is constant, the mean drop size increases with increasing hold-up, however, these manners for any system are different quantitatively. it shows that with the addition of solute (acetone) concentration in the system, the mean drop size decreases. the experimental results were compared with the desnoyer and quadros models, of which the quadros model has a little deviation from desnoyer model.