4A Molecular Sieve


4A Molecular Sieve

Molecular sieves beads and pellets are applicable in different industries, some of which include medicals, refineries, natural gas, coal chemical, and oxygen generation among others. Our expertise in the supply of quality molecular sieves has allowed us to work with clients from all over the world.

Molecular sieve 4A, also called zeolite 4A, is one type of aluminosilicate crystal with average pores measuring 4 angstroms (0.4 nm). Molecular with kinetic diameter smaller than 4 angstroms will be adsorbed by zeolite 4A, otherwise, be excluded.4A molecular sieves are typically used for dehydration in the air brake systems, natural gas drying.

zeolite for cryogenic air separation

Technical Specifications

Properties Unit Bead Pellet  


Diameter mm 1.6-2.5 3.0-5.0 1/16’’ 1/8’’
Static Water Adsorption %wt ≥22.50 ≥22.50 ≥22.50 ≥22.50 RH75%, 25℃
Bulk Density g/ml ≥0.74 ≥0.72 ≥0.66 ≥0.66 Tapped
Loss on Ignition %wt ≤1.50 ≤1.50 ≤1.50 ≤1.50 550℃, 1hr
Loss on Attrition %wt ≤0.10 ≤0.10 ≤0.20 ≤0.30 ~
Crush Strength N ≥40.00 ≥80.00 ≥40.00 ≥80.00 Avg. 25 beads
Particle Ratio % ≥ 97.00 ≥99.00 ~ ~ ~

Major Applications

Natural Gas

Natural gas must be dehydrated to remove water vapor. Water vapor causes the formation of hydrates, over saturation of natural gas, and corrosion of equipment. The high pressure increases saturation and creates more water vapor. Hydrates cause freezing and blocking of pipelines, valves, and other equipment, bringing production to a halt. Oversaturated gas does not meet pipeline specifications, which must be removed in order to sell.

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Natural Gas

Air Drying

As a process, air drying takes away the moisture from the air, keeping the machinery and equipment running uninterrupted.

This is an energy-efficient and cost-effective method of maintaining moisture levels within the area, which can help reduce production and maintenance costs.

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Air dryer

Zeolite 4A Molecular Sieve Storage and Regeneration

  • Storage

    The product should be stored in original pack or air-proof package in cool and dry conditions should not be left exposed to open air.

  • Regeneration

    Molecular sieve 4A can be regenerated by increasing temperature or reducing the pressure.

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