Compound A is extracted from a solution of A + B into a pure solvent
S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of
the solution containing A is 200 moles of B/hr.m2 and the solvent flow, rate is
400 moles of S/m2
. hr. The equilibrium data is represented by Y = 3X2
,
where Y is in moles of a A/moles of B and X is in moles A/moles of S. The
maximum percentage extraction achieved in the unit is
(A) 25%
(B) 50%
(C) 70%
(D) 90%