What is pervaporation

The word ‘pervaporation’ is a combination of ‘permeation’ and ‘evaporation’. The partial pressure difference of a component at the feed side and a vacuum at the permeate side results in a driving force for permeation of the desired component through the membrane. A high partial pressure difference as well as a high permeability will result in a high product recovery.
 
In pervaporation, the affinity of the desired, to be recovered component with the membrane determines its separation performance. If you want to selectively remove water from a mixture, Pervatech supplies membranes that are hydrophilic (‘affinity with water’). Conversely, if you want to extract organic compounds from water, organophilic membranes (‘affinity with organic compounds’) are suitable.