High Absorption Type A B C White Silica Gel

Type A B C White Silica Gel

Silica gel white, beaded or granular foam, that comes in many mesh and mm size for use in much industrial solution of the needed selectively adsorbency. The activated white silica gel has no smell or no taste, non-toxic and chemically no side effects take place, with its grate internal surface area which is able to adsorb the prodigious deal of moisture. The practical of white gel is nonindicating, when it free from moisture, it goes to transparent white, without any change its shape and size.

White silica gel prefers to absorb water and other substantial quality containing HC1, CO2, gasoline hydrocarbons, nitrogen, sulfur and aromatics compounds with a high capacity of moisture. For this reason, white silica gel prevents moisture, damage, spoilage and growth of mold from packaging materials.

Silica gel crystals are always use in dry product even when they are saturated with water and it is the most famous desiccants that is been used from many applications such as compressed air dryers, dehumidification process, dehydrated foods, pharmaceuticals, electronics product packaging.

The household appliances, a dehumidifier which reduces the level of dew point of humidity in the surfacing air, with the use of silica gel white beds to eliminate odor, mold and mildew which are grow inside. We are providing the silica gel white beads in packets foam for the desiccant dehumidifier where the low dew point is required. Silica gel white beads are available in 2-5 mm, 3-5 mm, 5-8 mm with achieving the grate result of moisture absorption process

Type:

Type A - clear pellets, approximate pore diameter: 2.5 nm, drying and moistureproof properties, can be used as catalyst carriers, adsorbents, separators and variable-pressure adsorbent.

Type B - translucent white pellets, pore diameter: 4.5-7.0 nm, liquid adsorbents, drier and perfume carriers, also may be used as catalyst carriers, cat litter.

Type C - translucent, micro-pored structure, raw material for preparation of silica gel cat litter. Additionally dried and screened, it forms macro-pored silica gel which is used as drier, adsorbent and catalyst carrier.

Silica alumina gel - light yellow, chemically stable, flame-resistant, insoluble except in alkali or hydrofluoric acid. Superficial polarity, thermal stability, performance greater than fine-pored silica gel.

Stabilizing silica gel - non-crystalline micro-porous solid powder, nontoxic, flame-resisting, used in brewery of grains for beer to improve taste, clearness, color and foam, removal of non-micro-organism impurities.

Features of White Silica Gel:
1.Non-indicating type
2.No chemical reaction
3.DMF Free
4.No small, color less and test less
5.Odorless
6.Food grade and Pharma grade

Industrial Applications:

1.Dehumidification process

2.Refrigerant and compressed air drying

3.Industrial gases drying and purifying

4.Moisture and water drying purpose

5.Solvent drying application

6.Prevent moisture, spoilage, mold and mildew

7.Chemical synthesis

8.Hearing Aids

Narrow pore Type A:

Characteristics
Transparent or translucent glass-like pellet or lump.
Average pore diameter: 2.0-3.0nm. specific surface area: 650-800 m2/g
pore volume: 0.35-0.45ml/g.
specific heat : 0.92 KJ/kg.℃.
thermal conductivity:0.63 KJ/m.hr.℃.
Use:Mainly used for drying and moisture proof, may also be used as catalyst carriers, adsorbents, separators and variable-pressure adsorbents, etc.

ITEM

Specifications

Typical values

Superior class

First class

Qualified class

Adsorption

Capacity

RH=20%,% ≥

8.0

7.0

6.0

11.2

RH=50%,% ≥

20.0

19.0

18.0

29.2

RH=90%,% ≥

30.0

29.0

28.0

37.6

Loss on heating, % ≤

2.0

4.0

6.0

1.0

pH value

4-8

--

--

4

Specific resistance,
Ω.cm ≥

3000

--

--

5630

Silica, % ≥

98

--

--

98.5

Qualified ratio of spherical granules, % ≥

82

--

--

90

Size

*

*

*

2-5mm

Bulk density, g/L

*

*

*

784

Note: qualified ratio of spherical granules is only applicable to fine-pored silica gel

Sizes:0.5-1.5 mm, 0.5-1 mm, 2-4 mm, 2-5 mm, 4-8 mm.
Packing:25 kg per bag or 500 kg per bag,net.
Note:The moisture content,packing and size may be customized per your specific requirements.

Type B:

Characteristics:Shape:pellets or lumps. Color:milky white, transparent or translucent. Pore volume: 0.60-0.85ml/g. Average pore diameter: 4.5-7.0nm Specific surface area: 450-650m2/g. Structure lying between macro-pored and fine-pored silica gels.
Use:Mainly used as liquid adsorbents, drier and perfume carriers, also may be used as catalyst carriers, silica sands, etc.

ITEM

Specifications

Typical values
( 2-5mm)

Superior class

First class

Adsorption capacity%

RH=20% ≥

4.0

3.0

6.2

RH=50% ≥

11.0

10.0

16.2

RH=90% ≥

70.0

50.0

73.9

Loss on heating, % ≤

2.0

2.0

1.0

Specific resistance(Ω.cm)≥

5000

3000

12500

pH

5.5—7.5

4—8

6.7

Bulk density, g/L

500—600

500—600

518

Size:0.5-1.5mm,2-5mm,3-5.5mm,4-8mm.
Packaging:15kg per compound bag or 300 kg. Per container bag.
Note:The moisture content, packing and size may be customized per your specific requirements

Type C:

Characteristics:Shape: Pellets. Color: cream, translucent. Micro-pored structure.
Use:Used as the raw material for preparation of silica sand. After being further dried and screened, it forms macro-pored silica gel which is used as drier, adsorbent and catalyst carrier.

ITEM

Specifications

Typical

values

C-I Type

C-II Type

Superior class

First class

0.5—3mm

1.5—5mm

Loss on heating, % ≤

6.5

7.0

6.5

6.5

3.2

Low size limit, %≤

5.0

5.0

5.0

5.0

0.2

Pore volume, ml/g ≥

0.78

0.76

0.65

0.65

0.92

Qualified ratio of spherical granuales, % ≥

60

60

---

---

87

Ratio of spherical granuales, % ≤

---

---

---

10.0

---

Bulk density, g/l

400--480

480--520

---

---

451

Size:1-8mm
Packaging:15kg. Per compound bag.
Note:Packing and size may be customized per your specific requirements.

Silica gel is a kind of high-active absorbing material, which is generally obtained by reaction of sodium silicate and sulfuric acid together with aging, acidic soaking and other series of post-processing. Silica gel belongs to amorphous substance and its chemical formula is mSiO2 . H2O. With stable chemical property, it won't burn and won't dissolve in any solvent except for alkali and hydrofluoric acid. Silica gels of various models form different fined-pore structures owing to different manufacturing methods. Additionally, the chemical components and physical structure of silica gel determine that silica gel owns many characteristics which can't be substituted by other materials of same kind, such as high absorption performance, excellent thermal stability, stable chemistry, high mechanical strength and others.

According to the size of pore diameter, silica gel can be classified into m acro -pored silica gel, coarse-pored silica gel, B-type silica gel and fine-pored silica gel. Owing to different pore structures, their absorption performances are various and own different characteristics. Coarse-pored silica gel owns higher absorbing capacity under high relative humidity, fine-pored silica gel owns higher absorbing capacity than coarse-pored silica gel under lower relative humidity, and B-type silica gel owns absorbing capacity which is between coarse-pored and fine-pored silica gel owing to its pore structure is between coarse-pored and fine-pored silica gel. In addition, m acro -pored silica gel is generally used as catalytic agent carrier, delustering agent, toothpaste abrasive. Therefore, we should select different varieties according to different purposes.

Safety Performance

The main component of silica gel is silicon dioxide, which owns stable chemistry and won't burn. As silica gel is a kind of amorphous substance, the dust content in workshop should be controlled below 10mg/sq.m. In addition, the ventilation should be enhanced and the operators should wear when operating.

Owning powerful absorbing capacity, silica gel has drying effect on human's skin. Therefore, the operators should wear working clothes when operating. If silica gel accidentally enters into eyes, please wash with a great of water and then go to hospital as soon as possible.

Owing to containing a little cobalt chloride, b lue silica gel is poisonous. Therefore, it should avoid to contacting food and being sucked into mouth. If poisoning event occurs, please go to hospital for treatment immediately.During using process, silica gel absorbs water vapor or other organic substance in medium and its absorbing capacity decreases accordingly. However, it can be repeatedly used after being regenerated.

I Regeneration after silica gel absorbing water vapor

After silica gel absorbing moisture, the moisture can be removed through thermal desorption . The heating methods are various, such as electrothermal furnace , flue waste heat heating and hot air drying, etc.

The temperature of desorption heating is controlled between 120 ℃ and 180 ℃ . For blue gel indicator, allochroic silica gel and DL type blue silica gel, the temperature should be controlled between 100 ℃ and 120 ℃. During the regeneration of industrial silica gel of various kinds, the maximum temperature should not be higher than below limit:

For coarse-pored silica gel, it should not be higher than 600 ℃;

For fined-pored silica gel, it should not be higher than 200 ℃ ;

For blue gel indicator (or allochroic silica gel), it should not be higher than 120 ℃ ;

For alumino silica gel, it should not be higher than 350 ℃ .

For silica gel after being regenerated, its moisture should be controlled below 2% for repeated operation.

II Regeneration after silica gel absorbing organic impurities

1.Baking Method

For coarse-pored silica gel, it can be placed in baking furnace to rise to 500 ℃ to 600 ℃ and the gel granules will take on white or yellow brown after 6 to 8 hours. For fine-pored silica gel, the baking temperature should not be over 200 ℃.

2.Bleaching Method

After silica gel's absorption in saturated water vapor reaching to saturation level, put silica gel into hot water for soaking and bleaching. Additionally, remove waste oil or other organic impurities in combination with detergent.

3.Solvent Washing Method

According to the variety of organic substance absorbed by silica gel, please select appropriate solvent to dissolve the organic substances absorbed in silica gel and then heat the silica gel to remove the solvent.

III Notices on Regeneration:

1.When drying and regenerating, please note that the temperature should be gradually raised, in order not to cause breaking of gel granule and recycle rate reduction owing to drastic drying.

2.When baking silica gel for regeneration, too higher temperature will lead to change of pore structure of silica gel and reduce its absorbing effect obviously and affect its usage value accordingly. For blue gel indicator or allochroic silica gel, the temperature of desorption regeneration should not be higher than 120 ℃ , otherwise, the coloration effect will be lost owing to oxidation of coloring agent.

3.For regenerated silica gel, it is generally to screen the fine granules to make the granules equal and even.

Storage and Packing

Silica gel owns excellent moisture absorption capacity, so it should be stored in dry place, and a rack is required between packing materials and the ground. The packing materials include steel bucket, paper bucket, paper carton, plastic bottle, polyethylene plastic composite bag, flexible container, etc. Concrete packing specification refers to classified production introduction.

During transportation, silica gel should be prevented from rain, damp and solarization.

We have the following Silica gel:
1. Narrow pore silica gel, type A
2. Type-b silica gel
3. Wide pore silica gel, type C
4. Big wide pore silica gel
5. Super wide pore silica gel
6. Column chromatography silica gel
7. TLC (thin layer chromatography) silica gel
8. TLC silica gel plate
9. HPLC (High performance liquid chromatography) silica gel
10. Silica gel for beer
11. Fng water-proof silica gel (non-crack-up when it is put into water)
12. Silica acid
13. Active silica gel
14. Silica sol
15. Silica gel desiccant, silica gel sachet, silica gel bag: 0.5g, 1g, 2g, 3G, 4G, 5g, 10g, 20g, 30g, 50g, 100g, 500g, 1000g,etc.
16. High performance desiccant
17. Container use silica gel desiccant
18. Flowers drying desiccant
19. High performance & recycling cat litter
20. Cat litter
21. Changing color/indicator silica gel
22. Colorful silica gel
23. Fragrant silica gel
24. Blue silica gel
25. Orange silica gel
26. Toothpaste use silica gel
27. Cosmetic use silica gel
28. Edible additive silica gel
29. Silica Alumina Gel
30. Silica gel for construction material
31. Silica gel for insulator material
32. Silica gel tablet
Please tell us your exact specification, packing and order quantity.
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To get more information, just feel free to contact with us. Thanks.
Mr. Liu
Qingdaofraken international trading Co., Ltd
Address: RM1005 post mansion yan'an three road, qingdao, China
Tel: 0086 532 83899718
Fax: 0086 532 83623236