Project Description

3A Molecular Sieve

CAS NO.: 1318-02-1

Appearance: Sphere and Pellet

Standard Packaging: 25 KG/Carton box ,25 KG/Carton drum,150 KG/Steel drum

Delivery Time : 7-10 days

Quality Insurance: National Standard GB/T 10504-2017

20”GP Load : 9-13.5 Tons      40”GP Load: 18-27 Tons  (Palletized)

Inquiry

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 in moisture, but excludes molecules such as unsaturated hydrocarbons which can potentially form polymers; and this maximizes lifetime when dehydrating such molecules.

Typical Chemical Formula

0.4K2O  0.6Na2O  Al2O3  2.OSiO2  4.5H2O

SiO2 : Al2O≈2

Application

  • Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)
  • Cracked Gas Drying
  • Drying of natural gas, if COS minimization is essential, or a minimum coadsorption of hydrocarbons is required.
  • Drying of highly polar compounds, such as methanol and ethanol
  • Drying of liquid alcohol
  • Static, (non-regenerative) dehydration of insulating glass units, whether  air filled or gas-filled.
  • Drying of refrigerants

Regeneration

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 200-230°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.

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

Model

Ceramic Balls

Color

Light gray

Shape

Ball

Chemical composition

Al2O3 17-23%

SiO2

≤70%

Al2O3 + SiO2

≤93%

Fe2O3

<1%

TiO2

<0.5%

CaO

<0.5%

MgO

<0.5%

Na2O

<2%

K2O

<3.5

Physical properties

Leachable Iron (%)

≤0.1

Apparent Porosity by Weight (%)

D≥10mm

≤0.4

D=6mm

≤1.0

D=3mm

≤3.0

Water absorption (wt.%)

<0.5

Acid resistance (%)

>99.8

Alkaline resistance (%)

>85

Bulk Density

(g/cm3)

1.35

(lb/ft3)

84

Specific density

(kg/m3)

2300

(lb/ft3)

144

Moh’s hardness (scale)

>6.5

Thermal conductivity (w/m2.k)

0.9-1.0

Specific heat (J/kg.℃)

628-837

Max. Operating Temperature

(℃)

1050

(℉)

1922

Thermal expansion (%) (500℃)

0.20

Thermal Shock Stability (times)

(500 ℃ then water cooling)

10

Geometric properties

Nominal Size

(mm)

3 6 10 13 16 19 25 38

50

(inch)

1/8

1/4 3/8 1/2

5/8

3/4 1 1.5

2

Crush Strength Min.

(lbs)

77 176 234 572 726 1672 1870 2090

3476

(kg) 35 80 106 260 330 760 850 950 1580
(N/PC) 343 784 1039 2548 3234 7448 8330 9310 15484

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