Forty-five kilograms of a solution containing 30 wt% ethylene glycol in water is to be extracted with furfural. Using Figures 4.14a and 4.14c, calculate:
(a) The minimum quantity of solvent.
(b) The maximum quantity of solvent.
(c) The weights of solvent-free extract and raffinate for 45 kg solvent, and the percent glycol extracted.
(d) The maximum possible purity of glycol in the finished extract and the maximum purity of water in the raffinate for one equilibriumstage.