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Monopolar Membranes

Monopolar membranes

 

The main components of electrodialysis modules are polymeric ion-exchange membranes. The Ion exchange membranes are nanoporous materials which functional  properties are determined by the properties of the thin surface layer with a thickness from several nanometers to micrometers.
At present JSC "Schekoniazot" launched production of high-quality membranes on the classical technology on domestic resins. The company is the only Russian producer of heterogeneous monopolar ion-exchange membranes marks MK-40, MA-40, MK-40L, MA-41 and MA-41P. Membranes suitable for use in electrodialysers and electrodialysis plants.

Membranes of marks MK-40, MA-40, MA-41:
• reinforced by nylon polyamide and polyester:
• water-insoluble, also in weak inorganic acids and most organic solvents.
Membranes brands MK-40L:
• reinforced mylar cloth
• water-insoluble, also in weak inorganic acids and most organic solvents and strong mineral acid up to pH 0,5.
Warranty period of 2-5 years depending on the operating environment.

 

Monopolar membranes.

Name of indicator

Norm for model

MK-40

MK-40L

MA-41P

MA-41

MA-40*

Appearance

 

Opaque sheets without external objects with diameters greater than 2 mm., and through holes.

 

Opaque sheets with no punctures, no cracks with a through violation of ion exchange material larger than 2 mm., and no impurities,  projecting above the surface of membranes.

 

Size:

Length, mm., not less than
Width mm.
Thickness mm.

 

1420

450

0.3-0.5

 

 

1420

450

0.3-0.5

 

1420

450

0.3-0.5

 

 

1420

450

0.3-0.5

 

 

1420

450

0.3-0.5

 

Tensile strength, Mpa, not less than

11.9

9

10

11.0

11.9

Resizing on swelling, %

Along
Thickness

 

8 ±2

30 ±5

 

6±2

28±7

 

7±2

28±7

 

6±3

-

 

8±2

30±5

Surface electrical resistivity: Ohms per cm², max

10.0

13.0

8.0

11.0

10.0

Transfer number, share, not less than

0.8

0.8

0.8

0.94

0.9

Ionic group

 SO3H

SO3H

N(CH3)

N(CH3)

- N3-

Ionic form - counter ion

Na+

Na+

CL-

CL-

CL-

Inert binder

polyethylene

polyethylene

polyethylene

polyethylene

polyethylene

Reinforcing material

polyamide

polyester

polyamide

polyamide

polyamide

The size of the standard membrane sheet is 1420*450 mm. Permitted, with agreement with the customer, manufacturing of membranes of other sizes, but not more than 1420*900 mm without changing their electrochemical and physicochemical properties. Operating temperature range of  membranes - 10-50 degrees of Celsius.

*Membrane of mark MK-40 was withdrawn from mass production. Custom production is possible, in quantity no less than 100 units.

Мембраны МК-40 и МА-40Мембраны МК-40 и МА-40

Membranes are used in installations for different areas:

• demineralization of whey;

• purification of sugar syrups;

• desalting and deionization of water;

• wastewater treatment emitting valuable items;

• deep purification of biological and medical products;

• decontamination of radioactive wastewater;

• concentration of wastewater containing valuable components;

• preparation of water to heat.