Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

Helps in increasing the settling rate of the bubbles
Helps in increasing the bubble size entering the settler
All of these
Comprises of thin bed of substances of extended surface having high porosity

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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

0.5
0.7
0.9
0.25

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