Categories Desiccants Molecular Sieve 5A
Molecular sieve 5A
Molecular sieve 5A (so-called zeolites) are drying agents of type A and have 1x n-modules, whereby these zeolites have the highest polarity and preferably exclude water. These are synthetically produced aluminosilicates. Zeolites of type 5A contain calcium in their crystal lattice (Ca4.5Na3[(AlO2)12(SiO2)12]), the resulting pore diameter is approx. 0.5 nm. This constant structure results in a very high inner surface area of up to 1000m²/g. Together with their high electrostatic adsorption forces, these molecular sieves are therefore ideal for air drying.
Molecular sieves achieve a high absorption capacity even at low relative humidity. Thus they are able to dry the supply air very strongly. This makes it useful wherever the degree of drying is a decisive selection criterion. The maximum water absorption in a fully saturated environment is approx. 23%. There is no colour indicator to indicate the loading condition.
Chemical Composition: Sodium-Aluminium-Silicate
CAS-number: 1318-02-1
| Structure | A |
| Cations | Ca+ |
| Actual pore size | 0,5 nm |
| Effective pore size | 0,5 nm |
| Appearance and shape | Beige, solid balls |
| particle size | 3 - 5 mm |
| bulk density | 0,67 kg/l |
| pore volume | 0,35 - 0,70 ml/g |
| breaking strength | >80 N |
| Specific surface | 500 - 1000 m²/g |
| Gl575°C Loss on ignition | <1,5 % |
| rate of abrasion | <0,25 % |
| water absorption capacity | >230 ml/kg |