We make 3A, 4A, 5A, 13X, 13X APG, lithium and calcium X grades as beads and pellets, in stock sizes or to your specification.
Guangzhou Core Adsorbent: 10+ years of experience, a 10,000 m² ISO-certified factory in Henan and 10,000 t annual capacity — factory-direct supply and OEM.
Molecular Sieve products
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13X APG Molecular Sieve
High-strength, low-dust 13X grade for removing CO2 and water in air separation pre-purification units (PPU).
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13X Molecular Sieve
Sodium X-type zeolite with about 10 Å pores and high water and CO2 capacity, for gas sweetening, air…
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3A Molecular Sieve
3A molecular sieve is a potassium-exchanged A-type zeolite with a 3 Å pore opening. It adsorbs water while…
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4A Molecular Sieve
Sodium A-type zeolite with 4 Å pores that adsorbs water, CO2 and H2S, used for natural gas, air…
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5A Molecular Sieve
Calcium A-type zeolite with 5 Å pores for PSA hydrogen purification, n/iso-paraffin separation and removal of CO2, H2S…
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CaX Molecular Sieve
Calcium-exchanged X zeolite for N2O and trace-contaminant removal in air separation pre-purification, and for VPSA oxygen generation.
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CO Adsorbent Molecular Sieve (Cu-exchanged)
Copper-exchanged zeolite that selectively adsorbs carbon monoxide, for PSA recovery of CO from syngas and removal of CO…
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CO2 Adsorbent Molecular Sieve
Molecular sieve with strong CO2 selectivity over CH4 and N2 and a large pressure-swing working capacity, for biogas…
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Molecular Sieve for Methane Enrichment
Kinetic-selective adsorbent that takes up nitrogen far faster than methane (N2/CH4 kinetic selectivity 405), used in PSA to…
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Molecular Sieve for Oxygen Concentrator
Lithium LSX zeolite with the highest N2/O2 selectivity, for medical oxygen concentrators and PSA / VPSA oxygen plants.
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Molecular Sieve for Refrigerant
3 Å molecular sieve desiccant for refrigeration and air-conditioning filter-driers, drying R-134a and special refrigerants such as butane.
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Silver Zeolite Hydrogen Getter
Silver-exchanged zeolite that absorbs hydrogen released into the vacuum space of cryogenic tanks and insulated vessels. Non-flammable, no…
Which Molecular Sieve grade do you need?
Match the pore size to the molecules you must remove: 3A for drying polar liquids and olefins, 4A for general gas drying, 5A for PSA hydrogen, and 13X-type grades when H₂O and CO₂ must be removed together or for oxygen generation.
| Grade | Pore size | Key property | Typical use |
|---|---|---|---|
| 3A | 3 Å | Adsorbs H₂O; excludes ethanol and olefins | Ethanol dehydration, cracked gas, insulating glass |
| 4A | 4 Å | Adsorbs H₂O, CO₂, H₂S | Natural gas, air and refrigerant drying |
| 5A | 5 Å | Adsorbs n-paraffins, CO, CO₂ | PSA hydrogen, n/iso-paraffin separation |
| 13X | ≈ 10 Å | Removes H₂O and CO₂ together, mercaptans | Gas sweetening, general purification |
| 13X APG | ≈ 10 Å | High CO₂ capacity, low dust | Air separation pre-purification units |
| Lithium LSX | X-type | Highest N₂/O₂ selectivity | PSA / VPSA oxygen, oxygen concentrators |
| CaX | X-type | Strong N₂O and N₂ adsorption | ASU pre-purification, VPSA oxygen |
Where is Molecular Sieve used?
Molecular sieve is used wherever a gas or liquid must be dried or purified to ppm levels: natural gas and LNG, air separation, PSA oxygen and hydrogen, compressed air and petrochemical streams.
- Natural gas dehydration — 4A, 3A and 13X
- Air separation pre-purification — 13X APG with activated alumina
- PSA and VPSA oxygen generation — lithium LSX and 13X
- PSA hydrogen purification — 5A and 13X
- Compressed air drying — 4A and 3A with activated alumina
- Ethanol and olefin drying — 3A
How is Molecular Sieve manufactured and tested?
We make every grade in our own Henan plant — synthesis, forming, activation, screening and packing — and test each lot before it ships with a COA.
- Synthesis and ion exchange — Na-A and Na-X zeolite crystallised on site, then exchanged with K, Ca or Li for 3A, 5A, CaX and lithium grades.
- Forming — beads of 1.6–2.5 mm and 3.0–5.0 mm, pellets of 1/16″ and 1/8″.
- Activation and packing — calcined in rotary kilns and sealed hot in moisture-proof drums or jumbo bags.
- Lot testing — static H₂O / CO₂ adsorption, crush strength, attrition, bulk density and loss on ignition.
- Capacity and quality system — 10,000 t per year under ISO-certified quality management.