XINTAO 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 inÃÂÂÂÂÂÂ moisture, but excludes molecules such as unsaturated hydrocarbons which can potentially form polymers; and this maximises lifetime when dehydrating such molecules.
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Typical Chemical Formula
0.45 K2O . 0.55 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
SiO2 : Al2O3 âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂ2
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Technical Parameter
| Item | Unit |
Technical data |
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Shape |
ÃÂÂÂÂÂÂ |
Pellet |
Sphere |
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Diameter |
mm |
1.5-1.7 |
3.0-3.3 |
1.7-2.5 |
3.0-5.0 |
Size ratio up to grade |
% |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥98 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥98 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥96 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥96 |
Bulk density |
g/ml |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥0.68 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥0.68 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥0.68 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥0.68 |
Wear ratio |
% |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä0.20 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä0.25 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä0.10 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä0.10 |
Crushing strength |
N |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥45/cm |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥60/cm |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥30/piece |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥70/piece |
Static water adsorption |
% |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥20 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥20 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥20 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÂÂÂÂÂÂÂ¥20 |
Ethylene adsorption |
% |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä3.0 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä3.0 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä3.0 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä3.0 |
Water content, as shipped |
% |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä1.5 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä1.5 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä1.5 |
âÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂÃÂÂÂÂÂä1.5 |
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Typical Application
1)ÃÂÂÂÂÂÂ Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)
2)ÃÂÂÂÂÂÂ Cracked Gas Drying
3)ÃÂÂÂÂÂÂ Drying of natural gas, if COS minimization is essential, orÃÂÂÂÂÂÂ a minimum co-adsorption of hydrocarbons is required.
4)ÃÂÂÂÂÂÂ Drying of highly polar compounds, such as methanol and ethanol
5)ÃÂÂÂÂÂÂ Drying of liquid alcohol
6)ÃÂÂÂÂÂÂ Static, (non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
7)ÃÂÂÂÂÂÂ Drying of refrigerants
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Regeneration
XINTAO molecular sieve Type 3A can be regenerated by either heating in the case of thermal swing processes; or by lowering the pressure in the case of pressure swing processes.
To remove moisture from a 3A molecular sieve, a temperature of 200-230ðC is required. A properly regenerated molecular sieve can give moisture dew points below -100ðC.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.
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Size
3A - ZeolitesÃÂÂÂÂÂÂ are available in beads of 1-2 mm, (10x18 mesh) 2-3 mm, (8x12 mesh) , 2.5-5 mm, (4x8 mesh)ÃÂÂÂÂÂÂ and as powder, and in pellet 1.6, 3.2.
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Attention
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
