Molecular Sieve

Molecular sieve is a material containing tiny pores of a precise and uniform size that is used as an adsorbent for gases and liquids. Molecules small enough to pass through the pores are absorbed while larger molecules are not. It is different from a common filter in that it operates on a molecular level.

For instance, a water molecule may be small enough to pass through while larger molecules are not. Because of this, they often function as a desiccant. Molecular sieve can absorb water up to 22% of its own weight.

We are proud to provide series of molecular sieves with strong ability of selective absorption, high mechanical strength, high abrasion resistance, and thermal stability.  In accordance with your specific needs, specification of molecular sieve can be adjusted to match your application.

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Type

Bulk density (kg/m³)

Water absorption (%)

Loss on abrasion
(%)

Application

3A

0.60-0.70

19-20

0.3-0.6

Drying agent for pyrolysis gas and alkene

4A

0.60-0.70

20-21

0.3-0.5

Drying agent for natural gas and absorbent for paraffin separation

5A

0.65-0.70

21-21

0.3-0.5

Dehydration, desulfurization and purification of air, natural gas and oil during oxygen making and hydrogen making by PSA processes

5A-DW

0.45-0.50

21-22

0.3-0.6

Dewaxing of aviation kerosene and paraffin separation

10X

0.50-0.60

23-24

0.8

High-pow absorbents for removal of H₂O, H₂S and CO₂, in liquid and gas, as well as for paraffin separation

13X

0.55-0.65

23-24

0.4

Drying, desulfurization and purification of oil and gas

13X-AS

0.55-0.65

23-24

0.3-0.5

Drying and decarbonization in air separation

Cu-13X

0.50-0.60

23-24

0.3-0.5

Absorbent for removal of thioalcohol in aviation kerosene and liquid hydrocarbon

Packing
25Kg carton or 55 gallon iron drum

3A Molecular Sieve
The pore size of 3A molecular sieve is 3A. It does not adsorb any molecular larger than 3A.

According to the industrial application specialties, our products have the characters of higher adsorption speed, stronger crushing and anti-contaminative resistance, more cyclic times and longer work-span. All these advantages have made it come to be the most essential and necessary desiccant in the fields of the deep drying, refinery polymerization for cracked gasses (pyrolysis gas), ethylene, propylene and any other non-acidic gasses of liquids in petroleum and chemical industrials.
　

Formula
0.4K₂O · 0.6Na₂O · Al₂O₃ · 2.0SiO₂  · 4.5H₂O
　

Typical Application

• Dehydration of many kinds of liquids (such as ethanol)

• Dehydration of air

• Dehydration of refrigerant

• Dehydration of natural gas or methane

• Dehydration of cracked gas (pyrolysis gas), ethylene, propylene or butadiene

Typical Application

• Drying, purification of air

• Absorption of CO₂

　

13X Molecular Sieve
It's a sodium form of type X crystal and has a larger pore opening than type 4A molecular sieve. It can adsorb molecules with a kinetic diameter of less than 9 Angstrom (0.9nm) and excludes larger molecules.
　

Formula
Na₂O · Al₂O₃ · 2.45SiO₂. · 6.0H₂O

Chemical Component

• Silicon Dioxide: < 60 %
• Aluminum Oxide: < 40 %
• Sodium Oxide: < 20 %
• Magnesium Oxide: < 5 %

Typical Application

• Oxygen generators: medical or bulk Oxygen production

• Absorption of CO₂ and moisture

• Drying of compressed air