In the chemical, energy, electronics, and manufacturing industries, the drying and separation of gases are essential processes. As highly efficient adsorbents, molecular sieves operate based on their precisely engineered pore structures, which selectively adsorb molecules of specific sizes to achieve accurate separation and deep dehydration. Among them, the 3A, 4A, and 5A molecular sieves are outstanding representatives. Although derived from the same material system, differences in pore size give each type its own irreplaceable role across various industries.
The working principles of molecular sieves are determined primarily by their pore diameters—0.3 nm / 0.4 nm / 0.5 nm for 3A, 4A, and 5A respectively. Each molecular sieve adsorbs gas molecules smaller than its pore size. The larger the pore size, the more types of molecules it can adsorb, and the higher its adsorption capacity. Simply put:
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3A molecular sieve: adsorbs molecules smaller than 0.3 nm
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4A molecular sieve: adsorbs molecules smaller than 0.4 nm
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5A molecular sieve: adsorbs molecules smaller than 0.5 nm
3A Molecular Sieve — Specialist for Deep Dehydration
With a pore size tailored to water molecules (around 0.27 nm), the 3A molecular sieve excels at removing moisture. It is widely used in the deep drying of ethanol and other liquids, in insulating glass drying, and in the purification of nitrogen–hydrogen mixtures. It has earned a strong reputation in the chemical, pharmaceutical, and building materials industries as a reliable moisture-removal guardian.
4A Molecular Sieve — Versatile, High-Capacity Adsorbent
Featuring a larger pore size and stronger adsorption capacity, the 4A molecular sieve is extremely versatile. It is ideal for the deep drying of air, natural gas, and hydrocarbons. It is also used for moisture control in electronic components, argon purification, and as a high-performance dehydrating agent in paint and dye production—demonstrating its remarkable universality across industries.
5A Molecular Sieve — Expert in Gas Separation & Purification
With an even larger pore structure, the 5A molecular sieve plays a major role in separation and purification technologies. It efficiently removes CO₂ and H₂S from natural gas, and is widely used in processes such as petroleum dewaxing and normal-paraffin separation. In gas generation systems, it is a core material for producing oxygen, nitrogen, and hydrogen.
From miniature electronic components to large-scale energy projects, Shanghai Joozeo’s 3A, 4A, and 5A molecular sieves deliver precise molecular sieving performance, providing safe, efficient, and reliable drying and separation solutions for global industries. They are the invisible force driving the refinement and advancement of modern industrial production.
Post time: Nov-27-2025