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oxygen molecular sieve 4A 

Molecular sieve 4A is an alkali alumino silicate; 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).

4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger.

Such adsorbable molecules include simple gas molecules such as oxygen, nitrogen, carbon dioxyde and straight chain

hydrocarbons.Branched chain hydrocarbons and aromatics are excluded.

Chemical Formular: Na2O.Al2O3.2SiO2.9H2O

SiO2 : Al2O3 ≈2.6-3.0

Technical Parameter

Item	Unit	Beads			Pellets
Diameter	mm	1.6-2.5	3-5	4-6	1/16"	1/8"
Static Water Adsorption	%wt	≥27	≥27	≥27	≥27	≥26
CO2 Adsorption	%wt	≥17.5	≥17.5	≥17.5	≥17.5	≥17.5
Methanol Adsorption	g/mg	≥ 140	≥140	≥140	≥ 140	≥ 140
Bulk Density	g/ml	≥ 0.70	≥ 0.68	≥ 0.66	≥ 0.68	≥ 0.66
Loss on Attrition	%wt	≤ 0.10	≤ 0.10	≤ 0.10	≤ 0.20	≤ 0.20
Loss on Ignition	%wt	≤ 1.50	≤ 1.50	≤ 1.50	≤ 1.50	≤ 1.50
Crush Strength	N	≥ 40	≥ 80	≥140	≥ 40	≥ 85
Size Ratio Grade	%	≥ 97	≥ 99	≥ 99
Water Content	%	≤ 1.5	≤ 1.5	≤ 1.5	≤ 1.5	≤ 1.5

Popular Applications

- Drying and removing of CO2 from natural gas,LPG,air,inert and athmospheric gases,etc.

- Removal of hydrocarbons,ammonia and methanol from gas streams (ammonia syn gas treating)

- Special types are used in the air break units of buses,trucks and locomotives

- Packed in small bags,it may be used simply as a packaging desiccant

Packing:

- 55 gallon air-tight iron drum,and each drum has inner PE bag.

- 25 kg/carton,and each carton has inner PE bag.

- by customer's design

  

oxygen molecular sieve 4A