Silica Gel

Description

CAS NO.: 112926-00-8
Molecular Formula:mSiO2·nH2O
Molecular Weight: 60.08
Molecular Structural Formula:

Classification

1. Silica Gel （Type A, Type B, Type C) ；
(1)Silica Gel Desiccant Type A, Type B
(2)Silica Gel Cat Litter Type C
2. Color Indicating Silica Gel ；
(1)Blue Indicating Silica Gel
(2)Orange Indicating Silica Gel
3. Pressure Swing Adsorption silica gel
Size :1-3, 2-4， 3-5, 2-5， 0.5-1.5etc..
TallKee Chemical we manufacture and supply a wide selection of available in high quality to satisfy different requirements from customers around the world .

1.Silica Gel （Type A, Type B, Type C)

(1)Silica Gel Desiccant Type A, Type B ;
(2)Silica Gel Type A

Characteristics

Narrow pore silica gel includes spherical silica gel and lumpy silica gel. The narrow pore silica gel is glass-like, transparent or semitransparent . The narrow pore silica gel is also called Type A silica gel.

Usage

Mainly used as desiccants to prevent items from moisture, also can used as catalyst carrier,  adsorbent, separating agent and the raw material to produce PSA and allochroic silica gel.

Item		Specification			Typical Value
Adsorption capacity		Superior class	First class	Qualified class
	RH=20%	10.5min	10min	8min	11.2min
	RH=50%	25min	23min	22min	29.2min
	RH=90%	34min	33min	32min	37.6min
Loss on heating,%		2.0	4.0	6.0	1.0
PH value		4--8	4--8	4--8	5.6
Specific resistance Ω.cm		5000min	3000min	3000min	4211min
Silica %		98.5min	98min	98min	98.5min
Qualified ratio of spherical granules %		95	90	80	90
Size		Negotiation	Negotiation	Negotiation	2-5mm
Bulk density, g/l		700-850			784
Note: The qualified ratio of spherical granules is only applicable to spherical silica Gel.

Sizes

0.5-1.5mm、1-3mm、2-4mm、3-5mm、2-5mm etc.

Silica Gel Type B

Characteristics

Type B silica gel is spherical with milky white, transparent or translucent color. Its pore structure is between wide pore and narrow pore silica gel.

Usage

Mainly used as adsorbent for water and gas and perfume carriers, also may be used as catalyst carriers, silica sands, atmosphere humidity regulator , whitening agent etc.

Size:

1-3mm, 2-4mm, 3-5mm, 4-8mm

Item		Specification		Typical Value（2-4mm）
		Superior class	First class
Adsorption capacity %	RH=20%	5.0min	4.0min	6.2min
	RH=50%	13.0min	11.0min	16.2min
	RH=90%	70.0min	50.0min	73.9min
Loss on heating %		2.0	2.0	1.0
Specific resistance Ω.cm		5000min;	3000min	7200min
PH value		5.2-7.5	4-8	6.7
500—600		500—600	500—600	538

(3)Silica Gel Cat Litter

Detailed information

Item		Target Value	Specification (Random Sampling)
Size		1-8MM	1-8MM
Appearance		Lump	Lump
Ratio of Size Qualified	≤1MM	Max.2%	0.8
	≥8MM	Max.2%	1
Loss on Heating% ≤		7	4.5
Bulk Density, g/l		400-500	430
PH value		7.0-7.5 7.19	7.0-7.5 7.19
Water Absorption %		100%	112%

3.Color Indicating Silica Gel

Blue Indicating silica gel

Characteristics

Blue silica gel is blue or light blue glass-like granules. According to two different shapes, it can be divided into spherical one and lumpy one. When adsorbing moisture, It can change color from blue to pink.

Usage

1. Mainly used for moisture adsorption and rust proofing when instruments and equipment are placed in obturation conditions, at the same time, by changing color from blue to pink after the moisture absorption, it can indicate ambient humidity directly.
2. It can be mixed with ordinary silica gel desiccant, we can get relative ambient humidity from desiccant adsorption level.
3. Desiccant silica gel can be put in packaging. It is widely used in precise instruments, leather, shoes, clothing, food, medicine, household appliances, etc.

Detailed information

Item		Blue indicating silica gel	Typical value
Adsorption capacity%	RH=20 % ≥	8.0	8.5
	RH=35 % ≥	13.0	13.6
	RH=50 % ≥	20.0	22.5
	RH=90 % ≥	30	31.4
Rattler loss % ≤		10	0.5
Qualified size ratio % ≥		99	99.1
Loss on heating % ≤		5.0	1.6
Displayed color	RH=20 %	Blue or light blue	qualified
	RH=35 %	Purple or red purple	qualified
	RH=90 %	Light red	qualified

Orange Indicating Silica Gel

Name:Orange Silica Gel Indicator

Technical Specification

ITEM		SPECIFICATION			Typical Value
		Superior Class	First Class	Qualified Class
Adsorption Capacity	RH=20%,% ≥	12	10	8	9
	RH=35%,% ≥	20	18	15	17
	RH=50%,% ≥	27	24	20	25
	RH=90%,% ≥	40	36	30	35
Rattler Loss,%≤		10	10	10	10
PH Value		2-4	2-4	2-4	3.0
Specific Resistance ,Ω.cm≥		5000	3500	3000	3500
Silica ,% ≥		98.2	98	98	98
Qualified Ratio of Spherical Granules ,% ≥		95	90	80	85
Ratio of Size Qualified ,% ≥		100	99.5	90	97
Moisture Content,% ≥		1.5	2.0	5.0	5.0
Bulk Density, g/ml		0.78	0.75	0.70	0.76
Color	RH 20% ≥	Light Yellow
	RH 35% ≥	Light Green
	RH 50% ≥	Light Dark Green
Original		Color Orange;

3.Pressure Swing Adsorption Silica Gel
Pressure Swing Adsorption PSA

Characteristics

Color: transparent or translucent, glass-like.
Chemical molecular formula:SiO2.nH2O.
It is nontoxic and odorless with stable chemical properties. It is similar to narrow pore silica gel, but its selective adsorption capability is higher than that. Fast adsorption and quick resorption are its typical features.

Usage

Pressure Swing Adsorption（PSA） is a kind of high and new technology silica gel used for gas separation and purification. Mainly used for the recovery, separation and purification of carbon dioxide. It is used in synthetic ammonia industry, food & beverage processing industry to extract carbon dioxide. It also can be used for drying, moisture adsorption as well as dehydration of organic products.
Detailed information

Item		Specification	Typical value（2-5mm）
Adsorption capacity%	RH=20 % ≥	10.5	11.7
	RH=50 % ≥	23.0	28.8
	RH=90 % ≥	36.0	38.4
Loss on heating % ≤		2.0	1.5
Qualified ratio of spherical granules % ≥		85	90
Bulk density g/l ≥		720	782
Qualified size ratio% ≥		94	99.8
CO2 adsorption capacity cm3/g≥		20	25.1
Compressive strength N ≥		100	189
N21.31 .CO29.6 From Southwest Chemical Research Institute