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White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density

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White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density

White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density
White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density

Large Image :  White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density

Product Details:
Place of Origin: CHINA
Brand Name: YIXIN
Certification: ISO9001
Model Number: YXF-005
Payment & Shipping Terms:
Minimum Order Quantity: 1-25ton
Price: usd550-650/ton
Packaging Details: 50kg/bag
Delivery Time: 3-15days after received deposit
Supply Ability: 1000 ton per month

White Sodium Silicate Fluoride Powder For Inorganic Material 2.68 Density

Description
Molcular Formula: Na2SiF6 Other Name: Sodium Hexafluorosilicate
EINECS: 240-934-8 Color: White
Appearance: White Free-flowing Powder Density: 2.68
High Light:

sodium fluorosilicate

,

sodium silicofluoride

 

Sodium Fluorosilicate powder commonly used in the inorganic material binding with the water glass

 

►Description 

 

Sodium fluorosilicate appears as white crystal, crystalline powder or colorless

 

hexagonal crystals. It is odorless and tasteless. Its relative density is 2.68; it has

 

moisture absorption capability. It can be dissolved in a solvent such as ethyl ether

 

but insoluble in alcohol. The solubility in acid is greater than that in water. It can be

 

decomposed in alkaline solution, generating sodium fluoride and silica. After

 

searing (300 ℃), it is decomposed into sodium fluoride and silicon tetrafluoride. It is

 

poisonous!In 25 degrees, the sodium fluorosilicate has its water solubility being

 

0.78%. Upon production, addition of an excess amount of sodium sulfate or sodium

 

chloride can increase the concentration of sodium ions in the system, thereby

 

increasing the solubility product of fluorine silicate and sodium ions, so that sodium

 

fluoride can be subject to more complete precipitation. Sodium fluorosilicate is the

 

byproduct in the production of calcium phosphate or the production of fluoride salt

 

in aluminum factory. It generally appears as a white crystalline powder with low

 

solubility in water (being 1% or less at room temperature), and the water solubility

 

increases slightly with increasing temperature. The aqueous solution of sodium

 

fluorosilicate is acidic (pH3). This is due to that its hydrolysis product contains

 

hydrofluoric acid. Reduction of the acidicity of the solution facilitates the hydrolysis

 

of sodium fluorosilicate. When pH is lower than 3.5-3.55, the hydrolysis reaction is

 

stabilized. When the pH is equal to 4, the hydrolysis reaction rate is significant.

 

When the pH value is equal to 8-8.5, the sodium fluorosilicate can be completely

 

hydrolyzed to exhibit as silica gel and precipitated out. Therefore, when sodium

 

fluorosilicate is added to the water glass, in addition to hardening effect of

 

precipitation of silicon dioxide gel caused by the neutralization of the sodium

 

hydroxide in the solution of water glass, the sodium fluorosilicate itself is also a

 

source of silica gel.

 

Specification 

 

   Na2Si6                Item                 Specification
Na2SiF6 ≥99%
Fe ≤0.02%
Loss of Weight on drying at 105°C ≤0.40%
Insoluble in Water ≤0.50%
Free Acid(HCL) ≤0.15%
Heavy Metal(Pb) ≤0.05%
 

 

►Toxicity

      This product is toxic with stimulation effect on the respiratory organ. People of

 

mistakenly oral poisoning will get severe symptoms of damage to the

 

gastrointestinal tract with the lethal dose being 0.4~4g. During the working of the

 

operator, they should wear the necessary protective equipment to prevent

 

poisoning. Production equipment should be sealed and the workshop should be

 

well ventilated.

►Production method

     Calcium superphosphate byproduct method: use sulfuric acid and ground

 

phosphate rock for production of superphosphate or fluorine-containing waste gas

 

during extraction of phosphate with water absorbing silicon tetrafluoride to make it

 

into fluorosilicate. When the concentration of fluorine acid solution reaches 8% to

 

10%, stand static for clarification and remove the impurities with the clarified

 

fluorine silicate solution being added of sodium chloride (being excess of about

 

25%) for reaction of sodium fluorosilicate. Further go through centrifugation

 

isolation, washing, air drying at a temperature below 300 ℃ and then pulverize to

 

obtain the finished product of sodium fluorosilicate.
 

H2SiF6 + 2NaCl → Na2SiF6 + 2HCl

 

►Storage characteristics

 

Treasury: ventilation, low-temperature and drying; store it separately from food and

 

acid

Application 

It is most commonly used in the inorganic material binding with the water glass.

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Tel: +8613391072385

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