Mass Transfer
Entrainer used in azeotropic distillation should

Have high viscosity to provide high tray efficiency
Form a new azeotrope of low relative volatility with one of the constituents of the mixture
Have high latent heat of vaporisation
Form a low boiling azeotrope with one of the constituents of the mixture

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Mass Transfer
Bollman extractor

Is a static bed leaching equipment
Employs only counter-current extraction
Is a centrifugal extractor
Is used for extraction of oil from oilseed

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