Introduction: Molecular Sieve type 4A (Angstrom) is an alkali alumino silicate, obtained through synthesis of type A zeolite in sodic form. it is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore opening of about 4 angstroms (0.4nm). Galaxychem type 4A molecular sieve will absorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger.
Typical application: Will absorb, in sequence of absorption rate, argon, krypton, xenon, ammonia, carbon monoxide, C2H4, C2H2, CH3OH, C2H5OH, CH3en2, CS2, CH3CL, CH3Br, and carbon dioxide.
- Deep drying of air, natural gas, alkane and refrigerant.
- Generation and purification of argon.
- Static dehydration of electronic element, pharmaceutical and unstable materials.
- Desiccant of paint, PU Plastic, dope and fuel etc.
Formula: Na2O·Al2O3·2SiO2·9/2H2O
Technical parameter
|
Item
|
Unit
|
Target
|
|||
|
Shape
|
|
Pellet
|
Sphere
|
||
|
Diameter
|
mm
|
1.5-1.7
|
3.0-3.3
|
1.7-2.5
|
3.0-5.0
|
|
Size ratio up to grade
|
% min
|
98
|
98
|
96
|
96
|
|
Bulk density
|
g/ml min
|
0.67~0.75
|
|||
|
Wear ratio
|
% max
|
0.20
|
0.25
|
0.20
|
0.20
|
|
Crushing strength
|
N min
|
30/cm
|
45/cm
|
60/p
|
70/p
|
|
Static absorption
|
% min
|
20.5
|
20.5
|
20.5
|
20.5
|
|
Methane absorption
|
% min
|
16
|
16
|
16
|
16
|
|
Packing water
|
% max
|
1.5
|
1.5
|
1.5
|
1.5
|
Regeneration: Molecular Sieve 4A can be revived for reuse and the required factors for revival are temperature and pressure. To remove the absorbed moisture and other materials, the revival condition shall be set up considering the features of target material and processing environment. The general revival temperature of Molecular Sieve 4A is about 300℃ and it should not surpass 450℃ at maximum.