2. A solvent extraction process takes place in a stirred vessel equipped with a Rushton turbine impeller (Po=5) of 0.6m diameter. The viscosity of the continuous phase is 0.02Pa.s and is much larger than the viscosity of the dispersed phase. The interfacial tension is 0.004N/m, the density of the continuous phase is 1000kg/m3, and the density of the mixture is 1100 kg/m3 Laboratory studies have shown that the acceptable extraction results were obtained when the Sauter mean diameter of the dispersed phase was 50m. Determine the impeller speed and power draw required to produce drops of that size in the stirred vessel. Given: The Sauter mean diameter in a turbulent dispersion can be calculated from: Ddy2=0.053We0.6We=eN2D3 The power draw can be calculated from: P=PoN3D3