REDFIL Organic Solvent Water Treatment Systems Factory Hollow Fiber NF Membrane China HNF-S 3040 Solvent-Resistant Nanofiltration Membrane
Product Description
HNF-S Solvent- resistant Nanofiltration (NF) Membrane
The HNF-S solvent-resistant series membrane uses polyimide as the membrane matrix material, with molecular weight cut-off (MWCO) around 200 Da. Solvent-resistant materials are selected as sealing materials, and 304 steel materials are used as shell materials.
They can operate stably in solvents of different polarities, with low
dissolution and residue, and can be applied in fields such as biomedicine and the food-processing industry. Characteristics: Wide tolerance to organic solvents; Super strong mechanical stability; Fiber robustness wires; Backwashing feasibility
Application: The membrane is suitable for material separation with solvent systems in the pharmaceutical, food, and
chemical industries, organic solvent recovery/purification, drug concentration (antibiotics, peptides), dissolved
chemicals recovery, production line cleaning waste liquid/hydrocarbon recovery, and purification.
Product Parameters
Inner and Outer Diameter
(mm) |
0.5/0.9 |
| Pore Radius (nm) |
0.2 |
| MWCO (Da) |
200 |
| PWP(LMH/bar) |
1-2 |
| Model |
HNF-S-1812-200 |
HNF-S-2540-200 |
HNF-S-3040-200 |
Effective Membrane Area
ft²(m²) |
3.23(0.3) |
32.30(3.0) |
118.43(11.0) |
Pure Solvent
Flux GPD
(m³/d) |
Methanol |
12(0.05) |
123(0.46) |
450(1.69) |
| Ethanol |
3(0.01) |
32(0.12) |
117(0.44) |
| Acetone |
8(0.03) |
77(0.29) |
284(1.06) |
| DMF |
2(0.01) |
21(0.08) |
78(0.29) |
Ave.Permeate
GPD
(m³/d) |
25(0.09) |
245(0.92) |
900(3.37) |
| Stable Rejection |
>90%(200 ppm PEG 200) |
| Testing Conditions: All data is collected at an operating pressure of 0.76 MPa,20ºC, and pH7 |
| Usage Conditions: Max. operating pressure: polar nonproton solvents such as DMF and NMP:218 psi, polar proton solvents such as methanol/ethanol:290 psi, Max. operating temperature:45ºC, pH value range of feed water during continuous operation:2-13. |
| Notes:1.The permeate flow of a single membrane element may vary within the range of ±15%;2.Backwashing pressure≤0.2 MPa. |
*The above parameters serve as reference values, and element parameters should be appropriately adjusted based on specific operational conditions.
*Please note that the company's products undergo continual optimization, and actual performance data may vary from those presented in the product catalog. Nanjing Weihua Membrane Technology Co., Ltd. reserves the final interpretation rights.
Nanofiltration Membrane
Customized Preparation of High-precision NF Membranes
* "Molecular Encapsulation" Technology
Drawing inspiration from controlled-release mechanisms in pharmaceuticals, the company pioneered the concepts of "molecular encapsulation" and "nanocapsules" in membrane technology. By encapsulating functional modifiers and orchestrating their release at precise intervals, we can achieve synchronized structural adjustments and functional enhancements in membranes.
By leveraging the innovative "Molecular Encapsulation" Technology, precise control over membrane pore size and charge enables the tailored production of nanofiltration membranes for effective ion separation across various systems.
High-performance Hollow Fiber NF Membranes
* Hierarchical Structure Synchronous Construction Technology
Commencing with an exploration of polymer chemical structures, molecular simulations, and solubility parameter calculations were employed to quantify polymer compatibility. This approach theoretically overcomes the challenge of interface compatibility in bilayer membranes. Through co-extrusion and the integration of composite structures from two different materials, a significant reduction in membrane material costs and streamlined membrane preparation processes have been achieved.
* Solve interface compatibility issues and ensure stable operation under harsh conditions
* Significantly simplify the membrane preparation process
Successful Cases
Life and Health Field Cases
-Solvent Recovery
To address inefficiencies and high costs associated with traditional methods used for separating small molecular drugs and solvents, our company has developed high-precision solvent-resistant hollow fiber NF membrane products. Our products enable efficient separation and recovery of these substances, thereby reducing solvent and energy costs by 50%.
Treatment Objective: Extraction of small molecule drug, recovery of methanol
Product Model: HNF-S
Treatment System: methanol
Drug Molecular Weight: 286 Da
Drug concentration: 1 mg/mL
Separation Performance: R ( small molecule drug)>99.2%
Methanol permeability: >2 L/ m2 h
Efficient interception of small molecule drugs with a molecular weight of 286 Da
Under high recovery rates, achieve purification and concentration of small molecule drugs and methanol recovery
1812 Nanofiltration (NF) Membrane
Nanofiltration (NF): The Nanofiltration membranes operate in the realm between Ultrafiltration, and Reverse Osmosis filtering water down to 1 nanometer (0.001 microns), hence the term "Nanofiltration". Nanofiltration has a removal rating of 20 to 98% for minerals such as magnesium and calcium (hardness/lime), while only having a removal rating of 20 to 80% for minerals such as sodium and chloride (salts). What this translates into is that the NF membrane will remove a large amount of hardness (kalk / lime), and reduce the total mineral content of the source water, however, it will still retain some of the minerals and salts from the source water.
The 1812 Nanofiltration (NF) Membranes are designed to work with low-pressure situations with small residential NF systems (such as under-the-counter Nanos) or with small purification systems used for applications such as household drinking water, restaurants, or in applications where the Total Mineral content is looking to be reduced, but not completely removed as would be the case with a Reverse Osmosis Membrane.
Application Area
Application Range:
Applicable to laboratory pure water machine, high-purity water preparation in the electronic chemical industry, water softening, seawater desalination, precious metal recovery, COD ammonia nitrogen removal, fermentation liquid concentration, drinking water treatment
Salt lake lithium extraction, high-salt wastewater resource utilization, landfill leachate, biomedicine, pesticide wastewater treatment, coal chemical wastewater treatment, household water purification, municipal water treatment
FAQ
Q1: What are the features of NF?
Highly Precise Separation
Low Energy Consumption
Convenient Operation
Fouling resistant
Long service life
Q2: What service is available in your company?
The products cover NF membrane elements and processes with various materials and MWCOs. Weihua provides solutions based on NF membranes for wastewater recycling, material separation, etc. globally. Our service covers multiple fields such as the chemical industry, biomedicine, environmental protection, and energy. Our products are applied in household water treatment, municipal water treatment, lithium extraction from salt lakes, zero discharge of high salt wastewater, purification and concentration of high-value products, organic solvent recovery, and material separation under harsh acid systems. We undertake sewage treatment and zero discharge resource utilization projects in the pharmaceutical, electronics, food, textile, papermaking, and landfill leachate treatment industries.
Q3: What does the Salt Rejection Ratio mean?
The Salt rejection describes the quality of salt removed from the NF membrane feed water stream as a percentage. It's one of the key elements of the NF membrane quality, however, other essential elements such as NF membrane performance durability, stability, application scope in different regions, and permeate flow output at the same pressure will all be important factors to judge the quality of the membrane.
Q4: How to select NF?
Firstly, check for the presence of corrosive substances, such as solvents, acids, and bases, in the separation system. If any are found, it is necessary to select special separation membranes. Next, determine the size of the substance to be separated and accordingly choose from the available NF membranes, categorized as LNF (large), MNF (medium), and SNF (small) models.
Q5: Under what circumstances can hollow fiber NF membranes be chosen?
High presence of organic contaminants
High residual chlorine content
Limited factory space
Municipal tap water treatment
Q6: What are the precautions when using NF?
1. Before use, pre-treatment is necessary to reduce fouling, scaling, and membrane degradation, thereby enhancing the operational efficiency of NF membrane elements.
2. Before use, the system should be flushed with purified water or product water for approximately 30 minutes.
3. The NF membrane elements are shipped with stored preservative solution, which consists of a sodium bisulfite (NaHSO3) water solution with a concentration of 0.5-1%. The pH value of the preservative solution should be tested every month, and if the pH≤3, the preservative solution should be promptly replaced.
4. Membrane components that are temporarily not in use should be sealed after being filled with a preservative solution. They should be stored in a flat, clean area on the ground, free from corrosive and contaminating substances, and kept away from indoor cold and heat sources. The storage environment temperature should be controlled within the range of 5-40ºC, with the recommended optimal storage temperature being 15-30ºC
Q7. Are you a factory?
Yes, we are not only just a factory but also have a professional service team, that includes sales, technical staff, QC, after-sales staff, etc.
Q8. How about your delivery time?
Generally, it will take one week after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q9. Do you test all your goods before delivery?
Yes, we have 100% test before delivery.
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