Pervaporation membrane is a layer of uniform molecular sieve crystal synthesized on a ceramic carrier. Molecular sieve has regular pore structure, which utilize the principle of screening for the separation of substances of different molecular size.
NaA molecular sieve membrane is a kind of membrane which can separate organic solvent and water with 0.41 nm pore structure, which is bigger than the kinetic diameter of water molecules of 0.29 nm and smaller than the molecular diameter of most organic compounds.
At the same time, the high aluminum content in the molecular sieve skeleton (Si/Al=1) makes it extremely hydrophilic, and capable to complete selective adsorption of the water in the solvent, which pass through the membrane on both sides of the water vapor by differential pressure, so that the water in the organic solvent is removed.
Pervaporation membrane separation technology is a new type of membrane separation technology, it can achieve the separation task at relatively low energy consumption, while traditional process of distillation, extraction, adsorption and other are difficult to achieve, it is especially suitable for the compound of nearly boiling point, constant boiling point mixtures, isomers, and poor thermal stability chemical compounds.
Pervaporation membrane technology has distinct advantages in the removal of trace water in organic solvents and mixed solvents as well as the separation of a small amount of organic pollutants in wastewater. The technology has been widely used in many industrial production fields such as petroleum, chemical industry, medicine, environmental protection and so on,
Technical characteristics:
- Safety and high efficient, the appropriate membrane area is selected according to customer requirements, and the dehydration of organic solvents is achieved in a fully enclosed membrane assembly unit under lower temperature and pressure.
- Energy saving and environmental protection, more than 2/3 energy saving than the traditional separation method.
- Simple process, easy operation, automatic production, with less additional processing, equipment runs on normal operation without too much adjustment and commissioning, automatic instrument monitoring to achieve automatic unattended.
- The product output purity is fully assured without bringing in any third component azeotrope, agent, etc., it will not pollute the product and is more suitable for the pharmaceutical, chemical, electronic and other industries to meet the high quality solvent requirements.
- High yield, with 98%-99.5% primary yield, the process line can be combined with other technologies to achieve zero emissions.
- Save the construction investment, the complete system unit is compact equipment with skid mounted placed in small installation area.
- Long membrane life, membrane service life is more than 5 years.
- Easy to aligning and be integrated with other processes or chemical reaction process.
