Sandry Clay Desiccant
January 12, 20173A Molecular Sieve – Insulating Glass
January 26, 2017
Silica Gel is available in porous, granular , and amorphous form, synthetically manufactured from the chemical reaction between sulfuric acid and sodium silicate. The internal structure of Silica Gel is composed of a vast network of interconnected microscopic pores which attract and hold water, alcohol, hydrocarbons and other chemicals by the phenomena known as physical adsorption and capillary condensation.
Use
Static adsorption by removing of moisture and
control of humidity in the package and other
enclosed spaces without induced airflow.
Dynamic adsorption by removing water from a
continuously flowing gas or liquid stream.
GENERAL |
Trade Name |
Silica Gel |
Silica Gel Blue or Indicating Silica Gel |
Chemical Family |
Sodium Silicate |
|
Chemical Name |
Synthetic Silica Gel |
|
Formula |
SiO2 .n(H2O) |
SiO2+H2O +CoCl 2 |
CAS |
7631-86-9 |
7646-79-9 |
Absorption Capacity (25℃) |
RH = 20% |
> 10.0% |
> 8.0% |
RH = 40% |
> 21.0% |
> 13.0% |
RH = 50% |
> 26.0% |
> 20.0% |
RH = 80% |
> 33.0% |
> 25.0% |
RH = 90% |
> 36.0% |
> 28.0% |
CHEMICAL DATA |
Compound |
Contents (%) |
Contents (%) |
SiO2 |
99.71 |
99.71 |
Fe2O3 |
0.03 |
0.03 |
Al2O3 |
0.10 |
0.10 |
TiO2 |
0.09 |
0.09 |
CaO |
0.01 |
0.01 |
ZrO2 |
0.02 |
0.02 |
Na2O |
0.02 |
0.02 |
CoCl2 |
- |
0.05 impregnated |
Loss on drying |
0.02 |
0.02 |
PHYSICAL DATA |
Shape |
Bead |
Bead |
Color |
Transparent White |
Blue |
Particle Size |
2-4mm |
2-4mm |
Average pore diameter |
2.0-3.0nm |
2.0-3.0nm |
Specific surface area |
>600㎡/g |
>600㎡/g |
Pore volume |
0.35-0.45 ml/g |
0.35-0.45 ml/g |
Specific heat |
0.92 KJ/ kg.℃ |
0.92 KJ / kg.℃ |
Thermal conductivity |
0.63 KJ/m.hr.℃ |
0.63 KJ/m.hr.℃ |
Bulk Density |
>750.00 g/l |
>750.00 g/l |
Moisture Loss |
<2.0% (180℃, 2 Hrs ) |
<2.0% (120℃, 2 Hrs ) |
PH Value (10% Aqueous Extract ) |
4‐8 |
4‐8 |
Specific Resistance |
> 4000 .cm |
>1000 .cm |
Silica Gel White & Orange
Silica Gel is available in porous, granular , and amorphous form, synthetically manufactured from the chemical reaction between sulfuric acid and sodium silicate. The internal structure of Silica Gel is composed of a vast network of interconnected microscopic pores which attract and hold water, alcohol, hydrocarbons and other chemicals by the phenomena known as physical adsorption and capillary condensation.
Use
Static adsorption by removing of moisture and
control of humidity in the package and other
enclosed spaces without induced airflow.
Dynamic adsorption by removing water from a
continuously flowing gas or liquid stream.
GENERAL |
Trade Name |
Silica Gel |
Silica Gel Orange |
Chemical Family |
Sodium Silicate |
|
Chemical Name |
Synthetic Silica Gel |
|
Formula |
SiO2 .n(H2O) |
SiO2 + H2O + C25H30CLN3 |
CAS |
7631-86-9 |
1327-36-2 |
Absorption Capacity (25℃) |
RH = 20% |
> 10.0% |
> 9.0% (Light Yellow) |
RH = 40% |
> 21.0% |
> 20.0% (Light Green) |
RH = 50% |
> 26.0% |
> 25.0% (Light Dark Green) |
RH = 80% |
> 33.0% |
> 32.0% |
RH = 90% |
> 36.0% |
> 35.0% (Dark Green) |
CHEMICAL DATA |
Compound |
Contents (%) |
Contents (%) |
SiO2 |
99.71 |
99.71 |
Fe2O3 |
0.03 |
0.03 |
Al2O3 |
0.10 |
0.10 |
TiO2 |
0.09 |
0.09 |
CaO |
0.01 |
0.01 |
ZrO2 |
0.02 |
0.02 |
Na2O |
0.02 |
0.02 |
Activated coloring agent |
- |
0.05 impregnated |
Loss on drying |
0.02 |
0.02 |
PHYSICAL DATA |
Shape |
Bead |
Bead |
Color |
Transparent White |
Orange (semi-transparent) |
Particle Size |
2-4mm |
2-4mm |
Average pore diameter |
2.0-3.0nm |
2.0-3.0nm |
Specific surface area |
>600㎡/g |
>600㎡/g |
Pore volume |
0.35-0.45 ml/g |
0.35-0.45 ml/g |
Specific heat |
0.92 KJ/ kg.℃ |
0.92 KJ / kg.℃ |
Thermal conductivity |
0.63 KJ/m.hr.℃ |
0.63 KJ/m.hr.℃ |
Bulk Density |
>750.00 g/l |
>750.00 g/l |
Moisture Loss |
<2.0% (180℃, 2 Hrs ) |
<2.0% (120℃, 2 Hrs ) |
PH Value (10% Aqueous Extract ) |
4‐8 |
4‐8 |
Specific Resistance |
> 4000 .cm |
>1000 .cm |
Silica Gel Indicator Color change according to RH