DuraMem® and PuraMem® membranes for organic solvent nanofiltration - OSN

Superior Membrane Performance


The DuraMem® and PuraMem® membrane series are market leading membranes for Organic Solvent Nanofiltration (OSN). Both DuraMem® and PuraMem® are made from P84® polyimide. Their superior stability in non-aqueous solvents allows users to generate extra product value in a wide variety of applications in chemical process industries. Benefits of OSN include reduced cost of goods, reduced energy consumption, and increased yield through gentle, ambient temperature separations.


DuraMem®

Where most polymeric organophilic membranes fail, DuraMem® excels. DuraMem® offers long term stability in most so called aggressive solvents such as solvents of the polar aprotic solvent family (acetone, tetrahydrofuran, dimethylformamide); as well as rejection of the smallest molecules in the nanofiltration range. 

Formats:

flat sheets and spiral wound membrane modules

Molecular weight cutoff range: 

150 to 900 Da

Recommended maximum temperature:

50°C 

Recommended maximum operating pressure: 

from 20 to 60 bar (290 to 870 psi)

Useable in:

acetone, ethanol, methanol, tetrahydrofuran, dimethylformamide*, dimethylsulfoxide*, dimethylacetamide*, isopropanol, acetonitrile, methylethylketone, ethyl acetate, and more 

Not recommended in the presence of:

chlorinated solvents, strong amines

* For non-standard DuraMem® membranes

PuraMem®

PuraMem® is the brand new membrane series stable in apolar hydrocarbon-type solvents. PuraMem® shows superior rejection and flux performance as compared to similar commercially available membranes. 

Formats:

flat sheets and spiral wound membrane modules

Molecular weight cutoff range: 

280 to 600 Da 

Recommended maximum temperature:

50°C 

Recommended maximum operating pressure:

from 20 to 60 bar (290 to 870 psi)

Useable in:

toluene, heptane, hexane, methylethylketone , methyl-isobutylketone, ethyl acetate, and more 

Not recommended with:

most polar and polar aprotic solvents, chlorinated solvents, strong amines