Unitedhb Group (www.unitedhb.com) produce 4A molecular sieve.  

4A  molecular sieve is an alkali alumina 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), adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger.  

Such absorbable molecules include simple gas molecules such as oxygen, nitrogen, carbon dioxide and straight chain hydrocarbons. Branched chain hydrocarbons and aromatics are excluded.  

Application

1,  Drying and removing of CO2 from natural gas, LPG, air, inert and atmospheric gases, etc

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

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

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

Regeneration

Molecular sieve Type 4A 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 4A molecular sieve, a temperature of 250-280°C is required.

The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.

Size

4A – Zeolite are available in beads of 1-2 mm, (10x18 mesh) 2-3 mm, (8x12 mesh) , 2.5-5 mm, (4x8 mesh) and as powder, and in pellet 1.6", 3.2".  

Attention

To avoid damp and pre-adsorption of organic before running, or must to be reactivated.  

You can call us or write to sales@unintedhb.com to get more details.