First grade desiccant activated alumina

Activated alumina:
1) Big specific surface area
2) Strong adsorption ability

Activated alumina introduction
Activated Alumina Properties
As a desiccant, it works by a process called adsorption. The water in the air actually sticks to the alumina itself in between the tiny passages, as the air passes through them. The water molecules become trapped so that the air is dried out as it passes through the filter. This process is reversible, and if the alumina desiccant is heated to about 200°C it will release all of the water stored in it. This process is called regenerating the desiccant. Air always has some water in it; one way to measure the amount of water in the air is the air's dew point

Usage of the product
Activated alumina is also widely used to remove fluoride from drinking water, and to a lesser extent, other substances. Normal 'safe' levels of fluoride are less than 4 ppm.
Above this level, fluoride causes osteoporosis, central nervous system disorders, and perhaps surprisingly, tooth decay. Drinking water in the U.S.A. usually has less than 2 ppm. Activated alumina filters can easily reduce this from .5 ppm to less than .1 ppm. The amount of fluoride leached from the water being filtered depends on how long the water is actually touching the alumina filter media. Basically, the more alumina in the filter, the less fluoride will be in the final, filtered water. Lower temperature water, and lower pH water (acidic water) are filtered more effectively too.

Product technical data
Index name
Al
2
o
3

%
Sio
2
%
Fe
2
o3
%
Na20
%
Burning reduction
%
Apparent density
g/ml
Specific surface area
M
2
/g
Hole volume
Ml/g
Crush strength
N/particle
Technical


requirements
≥92
≤
0.10
≤
0.04
≤
0.45
≤8
≤0.75
≥260
≥0.40
≥20
1-2mm
≥92
≤
0.10
≤
0.04
≤
0.45
≤8
≤0.75
≥260
≥0.40
≥40
2-3mm
≥92
≤
0.10
≤
0.04
≤
0.45
≤8
≤0.75
≥260
≥0.40
≥80
3-5mm
≥92
≤
0.10
≤
0.04
≤
0.45
≤8
≤0.75
≥260
≥0.40
≥100
4-6mm
≥92
≤
0.10
≤
0.04
≤
0.45
≤8
≤0.75
≥260
≥0.40
≥140
5-8mm