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Product Name: Molecular Sieve 4A
Product Type: NK-4A
Product Manufacturers: NKCHEM
Product Documentation: No Related Documents


Brief

Molecular Sieve 4A,Good adsorbent synthetic zeolite; High quality ,Low price ,Good reputation; Long-term relationship.


Molecular Sieve 4A Details

Molecular Sieve 4A

Introduction

molecular sieve 4A is an alkali alumino silicate and able to absorb molecules with their critical diameters no more than 4A; it is the sodium forms of the Type a crystal structure. molecular sieve 4A has an effective pore opening of about 4 angstroms (0.4nm). molecular sieve 4A will 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 dioxyde and straight chain hydrocarbons. Branched chain hydrocarbons and aromatics are excluded.

Typical Chemical Formula

Na2O. Al2O3. 2SiO2. 4.5 H2O
Si/Al ratio: SiO2/ Al2O3≈2
Pore diameter: About 4

Technical parameter 
 

 

Application 

 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.

Regeneration

Naike molecular sieve 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. A properly regenerated molecular sieve can give moisture dew points below -100°C.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.
Removal of water: Hot gas at 200-350°C and pressure 0.3-0.5Kg/cm2 flows through the molecular sieve bed for 3-4 h. lettemperature decreases down to 110-180°C, cooling.
Removal of organics: Regeneration is achieved by means of steam treatment to remove organics, and then remove water with method.


Conservation:

Room temperature, humidity <90%, non-expose to air; non-contactwithwater, acid and alkali

Size:

Molecular Sieve 4A 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”.

Packing:

Optional 1: carton box, each
box 25kg, inside airtight bag.
Optional 2: carton drum, each drum 30kg or 25kg, inside airtight bag.
Optional 3: steel drum, each drums 150kg.

Mainly Product:
Molecular Sieve 3A;
Molecular Sieve 4A;
Molecular Sieve 5A;
Molecular Sieve 13X;

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