Mass Transfer
L/mG is the expression for

Slope of operating line in absorber
Slope of operating line in stripper
Brinkman number
Absorption factor

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Mass Transfer
When the solvent dissolves very little of solute, then

Solvent of low latent heat of vaporisation should be used
Solvent of low freezing point should be used
Large quantity of solvent is required to extract the solute
Very small quantity of solvent is required

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