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Views: 0 Author: Site Editor Publish Time: 2025-07-09 Origin: Site
3A Zeolite Molecular Sieve is A potassium ion (K⁺) type zeolite with a pore size of approximately 3A (0.3 nm). Due to its unique pore size and ion exchange characteristics, 3A molecular sieve has significant applications in multiple industrial fields, mainly focusing on the selective adsorption of small molecule substances, especially water molecules (with a kinetic diameter of approximately 2.6A). The following are its typical application scenarios:
Deep drying (dehydration)
(1) Petrochemical and natural gas industry
Cracking gas/olefin drying
In the production process of olefins such as ethylene and propylene, 3A molecular sieves can selectively adsorb moisture (avoiding the adsorption of larger hydrocarbon molecules), preventing water vapor from freezing and blocking pipelines during the low-temperature separation process.
Natural gas dehydration and liquefaction (LNG)
Remove the moisture in natural gas, prevent the formation of hydrates, and ensure the safety of pipeline transportation and liquefaction processes.
(2) Refrigeration system
Drying of refrigerants (such as R134a, R404a)
It is used in automotive air conditioning and industrial refrigeration systems to adsorb moisture in the refrigerant, preventing ice blockage and corrosion.
(3) Dehydration by polar solvents
It is suitable for deep drying of solvents such as ethanol, methanol and acetone (the moisture content can be reduced to below 10 ppm).
2. Selective adsorption and separation
Separation of ethanol/water azeotropic system
In the production of bioethanol, 3A molecular sieve can break the euboiling point by adsorbing moisture and improve the purity of ethanol (up to over 99.5%).
Desiccant for insulating glass (double-glazed glass)
It is used in the interlayer of double or triple glass to adsorb residual moisture, prevent the glass from fogging up and extend its service life.
3. Chemical and pharmaceutical industries
Drying of pharmaceutical intermediates and active pharmaceutical ingredients
For heat-sensitive drugs (such as antibiotics and vitamins), low-temperature dehydration should be carried out to avoid high-temperature degradation.
Polymerization reaction protection
In the synthesis of polyurethane (PU), polyester (PET), etc., it adsorbs moisture in raw materials (such as isocyanate, ethylene glycol) to prevent side reactions.
Why choose CHEMXIN 3A molecular sieve?
Pore size advantage: The 0.3nm pore size only allows water molecules (2.6A) to pass through, repelling larger molecules (such as methane at 3.8A and ethylene at 4.2A), thus avoiding co-adsorption.
High adsorption capacity: Static water adsorption capacity can reach over 20% (at 25°C and a relative humidity of 50%).
Thermal stability: Can withstand a high temperature of 350°C, and its performance does not decline after regeneration.
CHEMXIN is a leading provider of Molecular Sieves, Activated Alumina, and related solutions since 2002. With over two decades of experience in gas, oil, and liquid treatment as well as industrial projects across the energy, environmental, and petrochemical sectors, we are committed to delivering high-quality products.
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