Instruction for use

PuraMem® 280 and S 600 Membrane Module
SPECIFICATIONS PURAMEM® 280 AND
PURAMEM® S 600
General Membrane Material: Polyimide (PuraMem® 280)
and Silicone-coated polyimide (PuraMem® S 600)
 Flat Sheet: 210 x 297 mm
 Spiral-Wound Modules:
Type

1812

2512

2520

2540

4020

4040

Nominal Size (Dia x L)

1.8”×12”2.5”×12”2.5”x20”2.5”×40”4.0”×20”4.0”×40”8.0”×40”

Membrane Area (m2)1

0.11

0.17

0.60

1.8

2.0

5.4

24.0

Typical Feed Flow (L.h-1)

1505005005001500

15007500

Standard Feed Spacer (all)1

8040*

30 mil (0.76 mm)* Female type of permeate tube connection.

SOLVENT STABILITY PuraMem® membranes are stable in mild and nonpolar solvents2:- e.g. Alcohols (e.g. Methanol, Ethanol, 2Propanol)- Aliphatic hydrocarbons (e.g. Hexane,Heptane)- Aromatic hydrocarbons (e.g. Toluene,Xylene)- Butyl Acetate, Ethyl Acetate- Methyl-Ethyl-Ketone- Methyl-tert-Butyl-Ether PuraMem® membranes are not recommended foruse in aqueous/water mixtures. For
aqueous/organic solvent mixtures, please contact
us for membrane recommendations.

USE CONDITIONSMembrane CodePuraMem®

PuraMem® S

MWCO (g.mol-1)3,4

280

600

Minimum Flux (L.m-2.h-1)31830

Typical Operating Pressure(barg)

20-40

20-40

Maximum Pressure (bar)60

60

Maximum Temperature (ºC)

50

50

Allowable pH

77

1 Membrane area is a nominal value and depends on the spacer dimensions

used in the module.
2 Data referring to membrane sheets with pure solvents. If you intend to use asolvent not listed above please contact us for further advice.
3 Performance Data are approximate and based on flat-sheet membrane. Test
conditions: toluene at 30 bar and 30ºC.
4 Based on rejection of styrene oligomers dissolved in toluene. MWCO =molecular weight cut-off which is defined as the molecular weight at which
90% rejection is obtained from a curve of rejection versus molecular weight ofstyrene oligomers dissolved in toluene.

Evonik Resource Efficiency GmbH | PuraMem® | June 2017 1/3

MODULE INSTALLATION PROCEDURES

3.
4.

1.

Membrane module should be installed inside a housing

2.

Close or block one side of the permeate tube of the5.

Connect the centre tube of the housing flange to the6.

compressed fitting reducing union. Please make sure

7.

3.

in a way that the PTFE seals is facing the feed inlet.

membrane module, using a ¾” compressed fitting cap.
membrane module permeate tube, using a ¾” x ½”

that the tubes are connected straight, and do not apply
4.

excess force onto the tubes while tightening the nuts.

6.

Start the feed pump and set the system pressure
between 3-5 bar, or until steady retentate andpermeate flows are obtained.

Collect the permeate into a separate tank with theretentate circulating back to the feed tank.

Increase slowly the system pressure to the desired
operating value.

Permeat the required volume of fresh solvent troughthe membrane or continue the permeation until thepermeate is colorless.

Hold the assembly horizontally and insert the8.

keep the assembly straight and do not bend the9.

housing

The above procedure for module preconditioning isusing the clamps.

procedure can be modified and solvent usage

membrane module inside the housing slowly. Pleasemodule or tube, and do not force the module into the5.

Set the temperature of the system up to 50 C.

Attach the flange with centre tube onto the housing
Attach the blank flange to the other end of the housing
using the clamps

PRECONDITIONING OF MEMBRANE MODULES
DuraMem® membranes are shipped with a preservative inthe membrane. Each module should be rinsed with theprocess solvent prior to use with a feedstock to remove thepreservative. The instructions below describe thepreconditioning process:1.

Install the membrane module(s) in the housing(s) of a2.

Fill the feed tank of the plant with fresh process

membrane plant.

solvent, at least 50 L solvent per m2 of installed
membrane

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Permeate can be recirculated to the feed tank and themembrane module is ready for use,

If needed steps 2 – 7 can be repeatedindicative, based on acetone, and for guidance only. The
increased/reduced depending on the application and theprocess tolerance for preservative in solution afterpreconditioning. Please contact us for the use of solvent
not listed in the specification.

Note – After the initial preconditioning process, the module
must be kept wet at all times and not allowed to dry out.

Note - Stable membrane performance is achieved after 2 to
4 hours of filtration.

STORAGE OF USED MODULES
Once installed and preconditioned, the membrane
module should not be removed from the module
housing. If the module will not be used for
prolonged periods, the module housing should befilled with an appropriate organic solvent and themodule stored in situ. The preconditioning
procedure should be carried out prior to re-use.
Please contact us if you have any questions.

Disclaimer
This information and all technical and other advice are based on
Evonik’s present knowledge and experience. However, Evonikassumes no liability for such information or advice, including theextent to which such information or advice may relate to third party
intellectual property rights. Evonik reserves the right to make anychanges to information or advice at any time, without prior orsubsequent notice. Evonik disclaims all representations andwarranties, whether express or implied, and shall have no liability
for, merchantability of the product or its fitness for a particularpurpose (even if Evonik is aware of such purpose), or otherwise.
Evonik shall not be responsible for consequential, indirect orincidental damages (including loss of profits) of any kind. It is thecustomer’s sole responsibility to arrange for inspection and testingof all products by qualified experts. Reference to trade names usedby other companies is neither a recommendation, nor anendorsement of the corresponding product, and does not imply
that similar products could not be used.

Evonik Resource Efficiency GmbHHigh Performance Polymers
Paul-Baumann-Straße 145772 MarlGermany
Phone +49 02365 49-4800
emet@evonik.com
www.puramem.com

Evonik Resource Efficiency GmbH | PuraMem® | June 2017 3/3