4A Molecular Sieve
Molecular Sieve
Chemical Formula：Na2O•Al2O3•2SiO2•9/2H2O
Si/Al ratio：SiO2/ Al2O3≈2
Pore diameter：About 4A
Use：Desiccant for gas and other material; adsorbent for Ar purification for the separation of methane, ethane and propane.
Technical parameter：
Parameter Unit Bead Pellet
Size mm 0.5-1.0 1.6-2.5 3-5 1.6 3.2
Water adsorption capacity
（25℃,RH50%） ％wt ≥21.5 ≥21.5 ≥21.5 ≥21 ≥21
Abrasion ％wt ≤0.2 ≤0.2 ≤0.2 ≤0.25 ≤0.25
Bulk density g/ml 0.69-0.75 ≥0.69 ≥0.69 ≥0.70 ≥0.65
Crush Strength N / ≥30 ≥80 ≥40 ≥70
Water content（575℃,3h） ％wt ≤1.5 ≤1.5 ≤1.5 ≤1.5 ≤1.5
Methanol adsorption capacity mg/g ≤140 ≤140 ≤140 ≤140 ≤140
Reactivation:
1、Removal of water: Hot gas at 200-350℃ and pressure 0.3-0.5㎏/㎝2 flows through the molecular sieve bed for 3-4 hours. let temperature decreases down to 110-180℃, cooling.
2、Removal of organics: Regeneration is achieved by means of steam treatment to remove organics, and then remove water with method 1.