The molecular sieve pervaporation membrane is a high-performance separation material that uses NaA-type molecular sieves as the core separation layer. The membrane is formed by in-situ growth on the surface of a tubular porous ceramic support, creating a dense and uniform structure.
With a pore size of approximately 4.2 Å, the membrane offers excellent molecular sieving capability and strong selectivity for water molecules. Its high-aluminum framework provides strong hydrophilicity, enabling efficient and stable dehydration of organic solvents. It is an ideal solution for energy-efficient separation and high-purity extraction.
The membrane operates based on the pervaporation separation mechanism. Driven by a temperature difference or vacuum, water in the liquid mixture is preferentially adsorbed by the membrane and diffuses through the molecular sieve channels. It then evaporates and exits as vapor on the permeate side.
The NaA molecular sieve has a pore size of approximately 4.2 Å, which matches the size of water molecules. This allows water to pass through selectively, while larger organic molecules are effectively retained, achieving highly selective separation and dehydration.
l Precise and Stable Pore Size: Approximately 4.2 Å, providing excellent molecular sieving selectivity for water.
l Strong Hydrophilicity: High-aluminum framework enhances adsorption of water molecules.
l Dense and Uniform Structure: Ensures consistent performance and long-term stability.
l Long Service Life: Excellent chemical and structural stability for extended operation.
l Tunable Performance: Membrane properties can be optimized for different separation systems.
l High Separation Efficiency: Superior dehydration performance reaching advanced industry levels.
l Mature and Reliable Process: Stable manufacturing process with strong product consistency.
l Organic Solvent Dehydration: Suitable for efficient dehydration of ethanol, isopropanol, methanol, and similar systems.
l Energy-Efficient Chemical Separation: Replaces conventional distillation in petrochemical and fine chemical processes, reducing energy consumption.
l Pharmaceutical Intermediate Purification: Removes water to improve product purity and stability.
l Waste Liquid Treatment: Separates water from industrial waste liquids to improve concentration efficiency.
l Fuel Ethanol Purification: Used in biofuel production for ethanol dehydration and concentration, enhancing product quality.
| Parameter | Value / Description |
| Membrane Type | NaA-type inorganic molecular sieve |
| Structure | Tubular ceramic porous support + molecular sieve top layer |
| Pore Size | 4.2 Å |
| Application | Organic solvent dehydration (e.g., ethanol dehydration) |
| Separation Factor (α) | >10,000 (90 wt% ethanol/water mixture at 75°C) |
| Permeation Flux (J) | >3 kg/(m²·h) (under the same conditions) |
| Operating Temperature | ≤75°C (recommended) |
| Si/Al Ratio | 1 (high-aluminum content) |
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