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Activate Alumina

Activated alumina is a highly porous form of aluminum oxide produced through the dehydroxylation of aluminum hydroxide. It has a surface area over 200 m2/g and is used as a desiccant and to filter contaminants from drinking water. Activated alumina has many tiny pores that cause its high surface area and allow it to effectively adsorb water and other molecules. It is also used as an adsorbent in various industrial catalyst and chemical production processes.

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Nazar Ahmed
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158 views3 pages

Activate Alumina

Activated alumina is a highly porous form of aluminum oxide produced through the dehydroxylation of aluminum hydroxide. It has a surface area over 200 m2/g and is used as a desiccant and to filter contaminants from drinking water. Activated alumina has many tiny pores that cause its high surface area and allow it to effectively adsorb water and other molecules. It is also used as an adsorbent in various industrial catalyst and chemical production processes.

Uploaded by

Nazar Ahmed
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Activate alumina

Activate alumina :

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 m²/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). It has a very high surface-area-to-
weight ratio, due to the many "tunnel like" pores that it has. Activated
alumina in its phase composition can be represented only by metastable
forms (gamma-Al2O3 etc.). Corundum (alpha-Al2O3), the only stable form of
aluminum oxide, does not have such a chemically active surface and is not
used as a sorbent

Catalyst applications

Activated alumina is used for a wide range of adsorbent and catalyst


applications including the adsorption of catalysts in polyethylene
production, in hydrogen peroxide production, as a selective adsorbent for
many chemicals including arsenic, fluoride, in sulfur removal from fluid
streams (Claus Catalyst process).

Desiccant

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.
Vacuum systems application
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
Warning
- Avoid breathing dust/ fume/ gas/ mist/ vapors/ spray Wear eye
protection/ face protection
- In case of inadequate ventilation wear respiratory protection
- IF IN EYES: Rinse cautiously with water for several minutes.
Remove contact lenses, if present and easy to do. Continue rinsing
- IF ON SKIN: Wash with plenty of soap and water

FIRST-AID MEASURES
Inhalation: Move personnel to fresh air. If necessary, give oxygen.
Eye Contact: Rinse immediately with water. Seek medical attention
if necessary.
Skin Contact: Wash immediately with water. Seek medical attention
if skin irritation persists.
Ingestion: No immediate hazards. If large quantities are ingested,
seek medical attention.
Note to Physicians: Not Applicable
Special Precautions/Procedures: Not Applicable

HANDLING AND STORAGE


Handling: Avoid dust formation in confined areas. Avoid contact
with the skin, eyes and clothing. Ensure adequate ventilation.
Storage: Keep container tightly closed in a cool, well-ventilated
place.
Storage stability: Keep container dry.

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