Pervaporation

Pervaporation (PV) and Vapour Permeation (VP)

Principle

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

Membranes

PERVAP™4100	Standard membrane developed for dehydration of most volatile organic mixtures
PERVAP™4101	Highly cross-linked membrane developed for dehydration of reaction mixtures and up to 50 wt% water
PERVAP™4102	Modified and highly cross-linked membrane for dehydration of volatile organic mixtures containing amines up to 500ppm
PERVAP™4510	High flux membrane especially developed for the dehydration of higher alcohols >C3
PERVAP™4155	Membrane with tailored separation properties suitable for removal of methanol and/or water from volatile organic mixtures
PERVAP™4060	Organophilic membrane suitable for removal of volatile organics and aroma compounds from aqueous solutions