Mass Transfer
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

0.9
0.5
0.7
0.25

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Mass Transfer
In case of an absorber, the operating

Line always lies above the equilibrium curve
Line always lies below the equilibrium curve
Velocity is more than the loading velocity
Line can be either above or below the equilibrium curve

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