Mass Transfer
Design calculation for multiple component distillation is done by

Enthalpy concentration method
Ponchon-Savarit method
Tray to tray calculations
Mccabe-Thiele method

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Mass Transfer
Steam distillation is not recommended to be used, if the

Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature
Azeotropic mixture is to be separated and the final product is miscible with water
Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature
Liquids decompose, if distilled directly at atmospheric pressure

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Mass Transfer
Pick out the wrong statement pertaining to leaching.

Very high temperature is not needed for the leaching of sugar beet
Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
Fine solids can not be leached in a Pachuka tank
Door classifier can be used for leaching of coarse solids

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