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Pervaporation (PV) and Vapour Permeation (VP)



Pervaporation is a thermal membrane separation process which can be used to remove water or methanol from organic solvents.

The pervaporation process requires neither regeneration nor the introduction of an additional fluid.  Therefore, further separation steps and environmental impact are avoided.


PERVAP™ Membrane

DeltaMem has a proprietary range of PERVAP™ polymer composite membranes in its portfolio.

DeltaMem’s PERVAP™ polymeric membranes for dehydration and methanol removal is based on polyvinyl alcohol (PVA) separation layer.

The separation layer is cross-linked in different ways to produce a range of hydrophilic membranes suitable for different pervaporation and vapor permeation applications.

DeltaMem also offers also world class inorganic pervaporation membranes.


Major Industrial Applications

  • Solvent dehydration
  • Methanol separation
  • Aroma recovery
  • Esterification processes
  • Debottlenecking of distillation processes


Typical Solvent

  • Ethanol
  • Isopropanol (IPA)
  • n-Propanol
  • Amyl alcohols
  • Ter-butanol
  • 2-butanol
  • Acetone
  • Methyl ethyl ketone
  • Acrylonitrile
  • 2-Butonal
  • Ter-butanol
  • 2-methyl tetrahydrofuran



Standard membrane developed for dehydration of most volatile organic mixtures


Highly cross-linked membrane developed for dehydration of reaction mixtures and up to 50 wt% water


Modified and highly cross-linked membrane for dehydration of volatile organic mixtures containing amines up to 500ppm


High flux membrane especially developed for the dehydration of higher alcohols >C3


Membrane with tailored separation properties suitable for removal of methanol and/or water from volatile organic mixtures


Organophilic membrane suitable for removal of volatile organics  and aroma compounds from aqueous solutions