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5A molecular sieve

Description:

Molecular Sieve type 5A is an alkali alumino silicate; it is the calcium form of the Type A crystal structure. The pore size of 5A molecular sieve is about 5 脜 . It can adsorb all kinds of molecular smaller than this size, it is mainly used in separation of the normal and isomerous alkane,pressure swing adsorption (PSA) for gases,co-adsorption of moisture and carbon dioxide.

Typical Chemical Formula
0.75 CaO . 0.25 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
SiO2 : Al2O3 鈮2

Technical Property of Molecular sieve 5A

Item

Unit

Technical data

Shape

Pellet

Sphere

Diameter

mm

1.5-1.7

3.0-3.3

2.0-2.8

2.8-4.75

Size ratio up to grade

%

鈮98

鈮98

鈮96

鈮96

Bulk density

g/ml

鈮0.64

鈮0.64

鈮0.66

鈮0.66

Wear ratio

%

鈮0.20

鈮0.40

鈮0.20

鈮0.20

Crushing strength

N

鈮30/cm

鈮45/cm

鈮30/piece

鈮60/piece

Static water adsorption

%

鈮21.5

鈮21.5

鈮21.5

鈮21.5

Static normal hexane adsorption

%

鈮12

鈮12

鈮12

鈮12

Water content, as shipped

%

鈮1.5

鈮1.5

鈮1.5

鈮1.5

Applications

Oxygen/hydrogen PSA (Pressure Swing Adsorption) process

Remove of water and carbon dioxide from air.
Type 5A Separate normal paraffins from branched-chain and / cyclic hydrocarbons through a selective adsorption process.

Ethanol refinement (moisture, CO2, etc.)

Regeneration
Molecular Sieve Type 5A can be regenerated by pressure swing or purging, usually at elevated temperatures. The purge gas temperature must be sufficiently high to bring the molecular sieve to a level of 200掳C - 350掳C.

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