Desiccant
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Gamma activated alumina/Gamma Alumina Catalyst Carriers/gamma alumina bead
Item
Unit
Result
Alumina Phase
Gamma Alumina
Particle Size Distribution
D50
μm
88.71
＜20μm
%
0.64
＜40μm
%
9.14
＞150μm
%
15.82
Chemical Composition
Al2O3
%
99.0
SiO2
%
0.014
Na2O
%
0.007
Fe2O3
%
0.011
Physical Performance
BET
m²/g
196.04
Pore Volume
Ml/g
0.388
Average Pore Size
nm
7.92
Bulk Density
g/ml
0.688
Alumina has been found to exist at least 8 form, they are α- Al2O3, θ-Al2O3, γ- Al2O3, δ- Al2O3, η- Al2O3, χ- Al2O3, κ- Al2O3 and ρ- Al2O3, their respective macroscopic structure properties are also different. Gamma activated alumina is a cubic close packed crystal, insoluble in water, but soluble in acid and alkali. Gamma activated alumina is weak acidic support, has a high melting point 2050 ℃, alumina gel in hydrate form can be made into the oxide with high porosity and high specific surface, it has transition phases in a wide temperature range. At higher temperature, due to dehydration and dehydroxylation, the Al2O3surface appears coordination unsaturated oxygen (alkali center) and aluminum (acid center), with catalytic activity. Therefore, alumina can be used as carrier, catalyst and cocatalyst.Gamma activated alumina could be powder, granules, strips or others. We could do as your requirement.γ-Al2O3, was called “ activated alumina”, is a kind of porous high dispersion solid materials, because of its adjustable pore structure, large specific surface area, good adsorption performance, surface with the advantages of acidity and good thermal stability, microporous surface with requisite properties of catalytic action, therefore become the most widely used catalyst, catalyst carrier and chromatography carrier in the chemical and oil industry, and plays an important role in the oil hydrocracking, hydrogenation refining, hydrogenation reforming, dehydrogenation reaction and automobile exhaust purification process.Gamma-Al2O3 is widely used as catalyst carrier because of the adjustability of its pore structure and surface acidity. When γ- Al2O3 is used as a carrier, besides can have the effects to disperse and stabilize active components, also can provide acid alkali active center, synergistic reaction with the catalytic active components. The pore structure and surface properties of catalyst depend on γ-Al2O3 carrier, so high performance carrier would be found for specific catalytic reaction by controlling the properties of gamma alumina carrier.Gamma activated alumina is generally made of its precursor pseudo-boehmite through 400~600℃ high temperature dehydration, so the surface physicochemical properties is largely determined by its precursor pseudo-boehmite, but there are many ways to make pseudo-boehmite, and different sources of pseudo-boehmite leads to the diversity of gamma – Al2O3. However, to those catalysts with special requirements to alumina carrier, only rely on the control of precursor pseudo-boehmite is difficult to achieve, must be taken to prophase preparation and post processing combining approaches to adjust the properties of alumina to meet different requirements. When the temperature is higher than 1000 ℃ in use, alumina occurs following phase transformation: γ→δ→θ→α-Al2O3, among them γ、δ、θ are cubic close packing, the difference only lies in the distribution of aluminum ions in tetrahedral and octahedral, so these phase transformation does not cause much variation of the structures. Oxygen ions in alpha phase are hexagonal close packing, aluminum oxide particles are grave reunion, specific surface area declined considerably.
Storage:lAvoid moisture, avoid scrolling, throw and sharp shocking during transportation, rainproof facilities should be readied..lIt should be stored in dry and ventilated warehouseto prevent contamination or moisture.Package:Type
Plastic bag
Drum
Drum
Super sack/Jumbo bag
Bead
25kg/55lb
25 kg/ 55 lb
150 kg/ 330 lb
750kg/1650lb
900kg/1980lb
1000kg/ 2200 lb
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Activated spherical shaped alumina gel/High performance alumina ball/alpha alumina ball
Activated Spherical Shaped Alumina gel
for injection in Air dryerBulk density (g/1):690Mesh Size：98% 3-5mm (including 3-4mm 64% and 4-5mm 34%)The regeneration temperature we recommend is between 150 and 200℃Euiqlibrium capacity for water vapour is 21%Test Standard
HG/T3927-2007
Test Item
Standard /SPEC
Test Result
Type
Beads
Beads
Al2O3（%）
≥92
92.1
LOI （%）
≤8.0
7.1
Bulk Density（g / cm3）
≥0.68
0.69
BET（m2/g）
≥380
410
Pore Volume（cm3/g）
≥0.40
0.41
Crush Strength(N/G）
≥130
136
Water adsorption （%）
≥50
53.0
Loss on Attrition（%）
≤0.5
0.1
Qualified Size（%）
≥90
95.0
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Activated Alumina Adsorbent For Hydrogen Peroxide
The product is a white, spherical porous material with the property of non-toxic, odorless, insoluble in water and ethanol. The particle size is uniform, the surface is smooth, the mechanical strength is high,the abilty of moisture absorption is strong and the ball is not split after absorbing water.
Alumina for hydrogen peroxide has many capillary channels and large surface area, which can be used as adsorbent, desiccant and catalyst. At the same time, it is also determined according to the polarity of the adsorbed substance. It has a strong affinity for water, oxides, acetic acid, alkali, etc. Activated alumina is a kind of micro-water deep desiccant and an adsorbent for adsorbing polar molecules.
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Activated Alumina For Water Treatment
The product is a white, spherical porous material with the property of non-toxic, odorless, insoluble in water and ethanol. The particle size is uniform, the surface is smooth, the mechanical strength is high, the ability of moisture absorption is strong and the ball is not split after absorbing water.
The partical size can be 1-3mm、2-4mm/3-5mm or even smaller such as 0.5-1.0mm.It has larger contact area with the water and specific surface area higher than 300m²/g, it has a big quantity of microspores and can ensure strong adsorption and high defluorination volume to fluorinnion in the water.
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Activated alumina ball/Activated alumina ball desiccant/Water treatment defluorination agent
The product is a white, spherical porous material with the property of non-toxic, odorless, insoluble in water and ethanol. The particle size is uniform, the surface is smooth, the mechanical strength is high, the ability of moisture absorption is strong and the ball is not split after absorbing water.
