AIM-4A Molecular Sieve is an alkali alumina silicate with 4 angstroms (0.4nm) pore opening. It can be employed to adsorb most molecules with less than 4 angstroms kinetic diameter such as oxygen, nitrogen, carbon dioxide and straight-chain hydrocarbons (Branched-chain hydrocarbons and aromatics are excluded).
Specific applications: Deep drying of natural gas, air, refrigerants, alkaline, and other gases and liquids; Static drying of pharmaceutical packaging, electronic components and perishable objects.
| Model |
AIM-4A |
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| Colour |
Light grey |
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| Nominal pore diameter |
4 angstroms(0.4nm) |
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| Shape |
Sphere |
Pellet |
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| Diameter (mm) |
1.7-2.5 (8*12 mesh) |
3.0-5.0 (4*8 mesh) | 1.6 (1/16 inch) |
3.2 (1/8 inch) |
| Size ratio up to grade (%) |
≥98 |
≥98 | ≥96 |
≥96 |
| Bulk density (g/ml) |
≥0.70 |
≥0.70 | ≥0.68 |
≥0.68 |
| Wear ratio (%) |
≤0.20 |
≤0.20 | ≤0.40 |
≤0.40 |
| Crushing strength (N) |
≥35/piece |
≥85/piece | ≥30/piece |
≥70/piece |
| Static H2O adsorption (%) |
≥21.5 |
≥21.5 | ≥21.5 |
≥21.5 |
| Static methanol adsorption(%) |
≥15 |
≥15 | ≥15 |
≥15 |
| Water content (%) |
≤1.5 |
≤1.5 | ≤1.5 |
≤1.5 |
| Typical Chemical Formula | Na2O . Al2O3 . 2SiO2 . 4.5 H2O
(SiO2 : Al2O3 ≈2） |
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