Slip velocity within mixer and through the column has been measured in a pilot plant Hanson mixer-settler column by using three different liquid-liquid systems with and without mass transfer conditions. The effects of agitation speed, dispersed and continuous phase flow rates, interfacial tension and mass transfer on slip velocity have been investigated under a variety of operating conditions. Two empirical correlations for prediction of the slip velocity within mixer and through the column are recommended in terms of physical properties of liquid systems and operating variables excluding holdup. The prediction of slip velocities from the presented correlations is in good agreement with experimental results.