Molecular Sieve type 3A is an alkali metal alumino-silicate; it is the potassium form of the type A crystal structure. Type 3A has an effective pore opening of about 3 angstroms (0.3nm). This is large enough to allow in moisture, but excludes molecules such as unsaturated hydrocarbons which can potentially form polymers; and this maximises lifetime when dehydrating such molecules. |
Shape | Sphere | Pellet | ||
Diameter (mm) | 1.7-2.5 | 3.0-5.0 | 1.6 | 3.2 |
Size ratio up to grade (%) | ≥98 | ≥98 | ≥96 | ≥96 |
Bulk density (g/ml) | ≥0.72 | ≥0.70 | ≥0.66 | ≥0.66 |
Wear ratio (%) | ≤0.20 | ≤0.20 | ≤0.2 | ≤0.2 |
Crushing strength (N) | ≥55/piece | ≥85/piece | ≥30/piece | ≥40/piece |
Static H2O adsorption (%) | ≥21 | ≥21 | ≥21 | ≥21 |
Ethylene adsorption (‰) | ≤3.0 | ≤3.0 | ≤3.0 | ≤3.0 |
Water content (%) | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
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