4a Molecular Sieve Desiccant For Generation And Purification Of Argon
Products Introduction
The pore size for Molecular Sieve 4A. The sodium based molecule is mainly used to adsorb water, methanol, ethanol, sulphureted hydrogen, carbon dioxide, ethylene, propylene. Type 4a available in beads and pellets which all plays a major role to replace sodium tripolyphosphate as the detergent auxiliary that makes environment free from pollution. It does not adsorb any larger molecule than its pore size.
| Molecular Formula | Na2O·Al2O3·2SiO2·9/2H2O |
| SiO2/ Al2O3 | ≈ 2 |
| Normal Pore Opening | 4 Angstroms (Å) |
| Regeneration temp. (°C) | 200-315 |
| Advantages | High Stability; High Strength; Large Water Absorption; Low Attrition; Deep Dehydration |
Technical Index
| Molecular Sieve 4A Typical Physical Properties | ||||
| Items | 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% ≥ | 20.5-22.5 | 20.5-22.5 | |
| Equilibrium Methanol Capacity | wt% ≥ | 15.0 | 15.0 | |
| Heat of Adsorption | BTU/lb of H2O | 1800 | 1800 | |
| Crush Strength | Point Contact | N ≥ | 30-80 | 85-160 |
| 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 interval value of the indexes above are on the basis of the different grade of Molecular Sieve 4A | ||||
Applications
Attention:
1. The product cannot be exposed in the open air and should be stored in dry condition with the air-proof package.
2. The product should be regenerated after a certain period of adsorption. The appropriate regenerated temperature would be better below 350°C.
