We supply desiccant, defluoridation and arsenic-removal grades as 1–2, 2–3, 3–5 and 4–6 mm balls, in stock sizes or to your specification.
Guangzhou Core Adsorbent: 10+ years of experience, a 10,000 m² ISO-certified factory in Henan and 10,000 t annual capacity — factory-direct supply and OEM.
Activated Alumina products
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Activated Alumina Desiccant
High-surface-area activated alumina balls for compressed air, gas and liquid drying, and as the guard layer above molecular…
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Activated Alumina for Arsenic Removal
Water-treatment activated alumina that adsorbs arsenic (arsenate) from well and municipal water; regenerable.
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Activated Alumina for Fluoride Removal
Defluoridation-grade activated alumina that removes fluoride from drinking water below the WHO guideline of 1.5 mg/L; regenerable.
Which Activated Alumina grade do you need?
Choose the desiccant grade for air and gas drying and the fluoride- or arsenic-removal grades for water treatment; in air separation units and gas dryers, a top layer of activated alumina protects the molecular sieve below.
| Grade | Key property | Typical use |
|---|---|---|
| Desiccant grade | High water capacity, regenerable by heat | Compressed air dryers, gas and liquid drying |
| Fluoride removal grade | Selective fluoride adsorption, regenerable | Drinking water defluoridation |
| Arsenic removal grade | Adsorbs arsenate; arsenite after pre-oxidation | Well water and municipal treatment |
| Guard layer | Takes up liquid water and acids first | Top layer over molecular sieve in ASU and gas dryers |
Where is Activated Alumina used?
Activated alumina is used wherever moisture must be removed from air or gas, or fluoride and arsenic must be removed from water.
- Compressed air drying — desiccant grade, alone or with 4A molecular sieve
- Drinking water defluoridation — fluoride removal grade
- Air separation pre-purification — guard layer above 13X APG
- Natural gas dehydration — guard layer above molecular sieve
How is Activated Alumina manufactured and tested?
We make activated alumina in our own Henan plant — calcination, ball forming, activation and screening — and test each lot before it ships with a COA.
- Flash calcination — aluminium hydroxide converted to active alumina powder.
- Ball forming — rolled into balls of 1–2, 2–3, 3–5 and 4–6 mm.
- Activation — aged and calcined to develop pore structure and surface area.
- Lot testing — crush strength, surface area, water adsorption, attrition, and fluoride capacity for water grades.
- Capacity and quality system — 10,000 t per year under ISO-certified quality management.