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Help Center18-99% Activated Alumina Ball,water Desiccant ,drying Agent
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Specifications
1)20 years professional manufacture2) drying agent
3)Ontime delivery
4)One-stop service
5)ISO9001
Description
Activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 square metres/g. The compound is used as a desiccant (to keep things dry by absorbing water from the air) and as a filter of fluoride, arsenic and selenium in drinking water. It is made of aluminium oxide (alumina; Al2O3), the same chemical substance as sapphire and ruby (but without the impurities that give those gems their color). It has a very high surface-area-to-weight ratio, due to the many "tunnel like" pores that it has
Application:
Activated alumina has much micro paths, so the specific surface is large. It can be used as absorbent desiccant and catalyst carrier. It is also a kind of trace water desiccant and the pole-molecular absorbent, according to the absorbed molecular polarization, the attachment force is strong for water, oxide, acetic acid, alkali etc.
Used as Catalyst ,Desiccant ,Fluoride adsorbent
Used 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. If the alumina desiccant is heated to ~200°C, it will release the trapped water. This process is called regenerating the desiccant.
Activated alumina is also widely used to remove fluoride from drinking water.
Vacuum systems
In high vacuum applications, activated alumina is used as a charge material in fore-line traps to prevent oil generated by rotary vane pumps from back streaming into the system.
Biomaterial
Its mechanical properties and non-reactivity in the biological environment allow it to be a suitable material used to cover surfaces in friction in body prostheses (e.g. hip or shoulder prostheses).
Technical data
|
Type Item |
Activated alumina absorbent |
Activated alumina desiccant |
Activated alumina catalyst carrier |
||||||
General type |
High strength type |
General type |
Air separation type |
||||||
Crystal type |
Y |
X-P |
Y |
||||||
Chemical composition% |
AL2O3 |
≥92 |
≥93 |
≥90 |
≥95 |
||||
Na2O |
≤0.3 |
||||||||
Other |
6-8 |
<10 |
<5 |
||||||
Physical property |
Size mm |
ø2-3 |
ø5-8 |
ø2-3 |
ø2-3 |
||||
ø3-5 |
ø3-5 |
ø3-5 |
|||||||
ø4-6 |
ø4-6 |
ø4-6 |
|||||||
Surface area m2/g |
≥300 |
300-325 |
≥300 |
350±20 |
200-400 |
||||
Porosity ml/g |
≥0.35 |
≥0.5 |
0.4±0.05 |
0.4±0.03 |
0.4-0.6 |
||||
Static water absorption % |
≥15 |
17-19 |
≥15 |
≥19 |
≥28 |
||||
Bulk density g/ml |
0.68-0.72 |
0.74-0.77 |
0.68-0.72 |
||||||
Abrasion rate % |
≤0.4 |
||||||||
|
Crush strength N/granule |
ø2-3 |
≥70 |
222----311 |
ø2-3 |
≥70 |
ø2-3 |
≥70 |
||
ø3-5 |
≥100 |
ø3-5 |
≥100 |
ø3-5 |
≥100 |
||||
ø4-6 |
≥100 |
ø4-6 |
≥100 |
ø4-6 |
≥100 |
||||
activated alumina balls , desiccant 18-99% activated alumina drying agent
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