Product Introduction
Positively Charged Nanofiltration Membrane Element
Positively charged nanofiltration membrane element has a positively charged membrane surface and can be widely used in the separation of polyvalent and monovalent positive ions, including lithium extraction from salt lakes, removal of heavy metal ions, biochemical pharmaceuticals, dye industry and other fields.
Polar Organic Solvent Resistant Nanofiltration Membrane Element
It has strong tolerance to polar organic solvents (Polar Organic Solvent, POS) such as methanol, ethanol, isopropanol, acetonitrile, etc. The membrane can be customized according to the different molecular weights of the intercepted products to meet the different needs of customers. It can be widely used in chromatographic mobile phases and other polar organic solvents.
Product Specifications Performance Parameters Table
Polar organic solvent resistant nanofiltration membrane element
|
model |
Glucose Removal rate |
Sucrose Removal rate |
Water production |
Effective membrane area |
Feed spacer |
Test solution concentration |
Test pressure |
||||
|
% |
GPD |
m³/d |
ft2 |
㎡ |
mil |
mg/L |
psi |
MPa |
|||
|
NF95-4040POS |
≥95 |
99.5 |
2300 |
8.7 |
100 |
9.3 |
28 |
Glucose Methanol solution: 2000 |
Sucrose methanol solution: 2000 |
225 |
1.55 |
Test conditions: test liquid temperature 25 ℃, recovery rate 15%; liquid permeation volume variation range ±15%.
Operation conditions
|
Maximum operating pressure |
600 psi (4.14 MPa) |
|
Maximum water inlet temperature |
45 ℃ |
|
Maximum water intake |
17.0 m3/h (8040)、3.6 m3/h (4040) |
|
Maximum inlet silt density index SDI15 |
5.0 |
|
Residual chlorine tolerance |
0.1 mg/L |
|
Inlet water pH range during continuous operation |
2-11 |
|
Chemical cleaning (30 min) pH range of influent water |
1-13 |
|
Maximum allowable pressure drop of a single membrane element |
15 psi (0.10 MPa) |
1. The maximum temperature for continuous operation at pH above 10 is 35°C;
2. Under certain conditions, the presence of residual chlorine and other oxidants can cause premature failure of the membrane. It is recommended that users remove residual chlorine by pretreatment before it contacts the membrane.
