Question: you have a stream of 250 gs of a liquid...

You have a stream of 250 g/s of a liquid mixture containing 50 wt% n- propyl propionate and 50 wt% n-propanol. You will be extracting the n-propanol using pure DES. The final propyl propionate-rich stream is to contain no more than 10 wt% n-propanol. All streams are at 293K.

(a) What S/F ratio is required to achieve this separation in a single equilibrium stage? What is the split fraction of propyl-propionate with this design?
(b) What S/F ratio is the minimum feasible amount to achieve this separation? What is the split fraction of propyl-propionate with this design?

(c) How many equilibrium stages are required to achieve the desired separation using an S/F ratio of 2.35?