Pervaporation

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Pervaporation is a method for the separation of mixtures of liquids by partial vaporization through a non-porous membrane.

How it works

The membrane acts as a selective barrier between the two phases, the liquid phase feed and the vapor phase permeate. It allows the desired component(s) of the liquid feed to transfer through it by vaporization. The fractionation process is mainly due to polarity differences, and not to the volatility difference of the components in the feed. The word is derived from the two basic steps of the process, firstly the permeation through the membrane by the permeate, then it's evaporation into the vapour phase. This process is used by a number of industries for several different processes, including purification and analysis, due to its simplicity and in-line nature.

Applications

Solvent Dehydration: dehydrating the ethanol/water and isopropanol/water azeotropes

Methanol and Ethanol Removal:

Continuous water removal from condensation reactions (esterification):

External links

[www.membrane-guide.com] suppliers, products, news and facts for engineers involved in the design or the operation of pervaporation systems.

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