molecular sieve 4A
Molecular formulaNa2O·Al2O3·2SiO2·4½H2O
Silicon to aluminium ratio:SiO/Al2O3≈2
Effective pore size: about4À Appearance:beige, beige or earth red spherical particles
Application: :4A molecular sieve mainly adsorbs water, methanol, ethanol, air, natural gas and other gases and liquids dry. It does not adsorb any molecule with a diameter larger than 4A (including propane), and it is the preferred desiccant for many kinds of chemical gases and liquids, refrigerants, medicines, electronic materials and volatile substances. The selective adsorption of water is higher than any other molecule. It is one of the most used molecular sieve species in industry.
Technical index:
Indicator | Unit | Spherical | |
Diameter |
mm |
1.6-2.5 |
2.5-5.0 |
Static water adsorption |
≥% |
20.5 |
21 |
Granularity |
≥ |
98 |
98 |
Bulk density |
≥g/ml |
0.65 |
0.65 |
Compressive strength |
≥N/ |
35 |
70 |
Relative standard deviation of compressive strength |
≤ |
0.3 |
|
Abrasion rate |
≤% |
0.2 |
0.2 |
Packaging water conten |
≤% |
1.5 |
1.5 |
Regeneration:
1, remove water: depending on the pressure, temperature and water content of regeneration gas. In general, 200 ~ 350 ℃ dry gas under 0.3 ~ 0.5kg/cm2 pressure, through the molecular sieve bed for 3 ~ 4 hours, so that the outlet temperature to 110 ~ 180 ℃, cooling.
2、De-organic matter: replace organic matter with water vapour, then remove water.
Storage:
Room temperature, relative humidity water greater than 90%; should not be directly exposed to air; avoid water, acid, alkali.
Packing: 25kg/bag or barrel. Also according to customer requirements.
Note: Avoid direct exposure of molecular sieve to air.