Sphere Zeolite 3A Molecular Sieve Desiccant for Double Glazing Unit Anhydration
Description of 3A Molecular Sieve Desiccant:
Molecular sieve (also known as synthetic zeolite) is a kind of aluminosilicate porous network crystal material, which is composed of SiO2 and Al2O3 tetrahedron, with uniform pore size (about several angstroms) and extremely large specific surface area. Metal cations (such as Na+, K+, Ca2+, etc.) are present in the molecular sieve lattice to balance excess negative charges in the tetrahedron. Different types of molecular sieves come in different pore sizes or shapes and can be used to separate a wide variety of molecules. Water is a very polar molecule, and the A-type molecular sieve has a very high affinity with water and is often used as an adsorbent with excellent effects.
The 3A type molecular sieve for insulating glass has a lattice channel of about 3 angstroms (1Å=0.1nm), which is the smallest channel among the commonly used molecular sieves. When it is in contact with air, it can only absorb gaseous water molecules in the air, but cannot absorb air. Other components (the content of helium and hydrogen in the air is only about 0.007%, which can be ignored). Any other molecular sieve with adsorption pore size larger than 3A will adsorb oxygen, nitrogen and other gases in the air, and this adsorption capacity will be very sensitive to small changes in temperature.
Specification of 3A Molecular Sieve Desiccant:
| Molecular Sieve 3A Typical Physical Properties | ||||
| Item | Unit | 8*12 Mesh | 4*6 Mesh | |
| Bead Size | mm | 1.6-2.5 | 3.0-5.0 | |
| Bulk Density | g/ml ≥ | 0.70-0.82 | 0.65-0.80 | |
| Equilibrium Water Capacity @ 25℃ | wt% ≥ | 19.0-21.0 | 19.0-21.0 | |
| Equilibrium Ethylene Capacity | mg/g≤ | 3.0 | 3.0 | |
| Heat of Adsorption | BTU/lb of H2O | 1800 | 1800 | |
| Crush Strength | Point Contact | N ≥ | 20-58 | 80-130 |
| Variation Coefficient | - | 0.3 | 0.3 | |
| Attrition Rate | wt% ≤ | 0.1 | 0.1 | |
| Size Qualification | % ≥ | 98 | 98 | |
| Package Moisture | wt% ≤ | 1.5 | 1.5 | |
| The above interval values are based on the different grades of 3A | ||||
Applications of 3A Molecular Sieve Desiccant:
1. Used in oil gas, gas streams of unsaturated hydrocarbon material dehydration of 3A molecular sieve professional;
2. Drying of highly polar compounds, such as methanol and ethanol. It is also used for dehydration of liquid alcohol and solvents;
3. Used for professional kerosene and jet fuel drying;
4. Application of 3a molecular sieve in isopropanol dehydration; Used for natural gas dehydration and prevent the formation of COS;
5. Used in deep desiccation of cracked petroleum gases, such as ethylene, propylene, butadiene, acetylene, and natural gas, and of polar liquid, such as ethanol, LPG, and solvent;
6. Static,(non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled;
7. Drying of refrigerants; dehydration of food-grade carbon dioxide;
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