Products in the News

Original Press Release

Duramem® and puramem® for Organic Solvent Nanofiltration

Press release date: Apr 14, 2017

DuraMem® and PuraMem® membranes are now available as a valuable addition to our Chemically Resistant Membranes product line. Duramem® and Puramem® polymeric membranes, made by Evonik, are market leaders for Organic Solvent Nanofiltration (OSN).

Organic Solvent Nanofiltration, i.e. separation of molecules dissolved in organic solvents through a semipermeable membrane, has gained great traction over the last decade. Advantages of OSN over conventional separation processes include lower energy requirements, conservation of expensive materials, and system robustness.

DuraMem® offers long term stability in most polar and polar aprotic solvents (acetone, tetrahydrofuran, dimethylformamide, isopropanol, acetonitrile, methylethylketone, ethyl acetate, and more), while PuraMem® series is stable in apolar hydrocarbon-type solvents (toluene, heptane, hexane, methylethylketone, methyl-isobutylketone, ethyl acetate, and more).

Technical Specs

Material: P84® polyimide

Molecular weight cutoff range:

Duramem®: 150 to 900 Da

PuraMem®: 280 to 600 Da

Recommended maximum temperature: 50°C (122°F)

Recommended maximum operating pressure: from 20 to 60 bar (290 to 870 psi)

Main Application Areas for DuraMem® and PuraMem® Membranes1

Removal of impurities or product purification

Monomer/dimer separation

Molecular fractionation

Room temperature solvent exchange

Catalyst recovery and recycle

Color removal

Solvent recycling

Both DuraMem® and PuraMem® series are available in a flat sheet format as well as spiral wound elements. For more information about these membranes and their applications, contact a Membrane Process Specialist at Sterlitech: E: sales@sterlitech.com or T: 253.437.0844.

Evonik Corporation: http://duramem.evonik.com/product/duramem-puramem/en/Pages/osn-membranes.aspx

Sterlitech Corp.

22027 70th Ave. S.

Kent, WA 98032-1911

Phone: 253-437-0844

Url: http://www.sterlitech.com

Contact:

Sales Department

email: sales@sterlitech.com