China Sodium Metabisulfite

Qingdao Tianya Chemical Co., Ltd is the leading manufacturer and supplier of Sodium Metabisulfite in China, we supply top quality Sodium Metabisulfite with top quality. Our Sodium Metabisulfite products have been sold to domestic market and over 100 countries and areas in the world. We supply Sodium Metabisulfite food grade and Sodium Metabisulfite Industrial grade with wide application fields.

 

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Basic Information:

Product Name Sodium Metabisulfite
Appearance White crystalline powder
Synonyms Sodium Pyrosulfite, SMBS
CAS No 7681-57-4
HS Code 28321000
Purity 97% Min
Molecular Formula Na2S2O5
Accurate Mass 189.898254
Water Solubility 540g/L
Grade Industrial Grade/Technical Grade
Package 25 Kg bag/jumbo bag
Production Capacity 300000 Tons/Year

Production Process of Sodium Metabisulfite

1. Crush the sulfur into powder and send it into the combustion furnace with compressed air for self ignition at 600-800℃. The amount of air added is about twice the theoretical amount, generating sulfur dioxide gas with a concentration of 10-13%. After cooling, dust removal, and filtration, sublimated sulfur and other impurities are removed, and the gas temperature is reduced to about 50 ℃, which is then introduced into a series reaction kettle.

2. Add sodium carbonate and water to the reaction kettle, stir to dissolve, and introduce sulfur dioxide gas for reaction until Ph is 4.1 to generate sodium bisulfite solution. The reaction formula is as follows:

Na2CO3+2SO2+H2O=2NaHSO3+CO2

3. Add the mother liquor of sodium bisulfite to the third stage reactor, and then add soda ash solution dissolved in water for neutralization reaction until the pH is 7-8 to generate sodium sulfite solution. The reaction formula is as follows: Na2CO3+2NaHSO3=2NaSO3+CO2↑+H2O

4. The generated sodium sulfite suspension is sequentially passed through the second and first stage reactors to absorb and react with sulfur dioxide until the pH is 4.1, generating sodium bisulfite solution. When the content of sodium bisulfite in the solution reaches saturation concentration, sodium metabisulfite crystals are precipitated, and the reaction formula is as follows: Na2SO3+SO2+H2O=2NaHO2NaHO3→Na2SO5+H2O

The reaction is an exothermic reaction, and the reaction temperature is controlled at about 45 ℃.

5. Sodium metabisulfite crystal slurry transferred from the first stage reactor is transferred to a centrifuge for centrifugation. The mother liquor after centrifugation returns to the reaction kettle in step 2, and wet sodium metabisulfite is sent to a dryer. After drying at 160 ℃, it is the finished product. The reaction exhaust gas is absorbed by alkaline solution and then vented.

Usage of Sodium Metabisulfite Food Grade

Food grade sodium metabisulfite can be used as a bleach and leavening agent for foods such as biscuits and cakes, a nutrient retention agent for vegetable dehydration, a preservative for storing fruits, and a bactericidal and preservative for brewing and beverages. Sodium metabisulfite slowly oxidizes to sodium sulfate when exposed to humid air, accompanied by crystal disintegration. Aqueous solutions decompose in air, especially under heating conditions, and nitrogen should be filled during hot pressing sterilization. Glucose can reduce the stability of aqueous solutions. Stable and effective in acidic solutions. Sodium metabisulfite should be stored in a closed container, away from light, in a cool and dry place.

Usage of Sodium Metabisulfite Industrial Grade

Industrial grade sodium Metabisulfite has a wide range of uses. In the pharmaceutical industry sodium Metabisulfite is used for the purification of chloroform, phenylpropylsulfone, and benzaldehyde production; sodium Metabisulfite is used as a coagulant in the rubber industry; sodium Metabisulfite is used in the printing and dyeing industry as a dechlorinating agent for cotton fabric bleaching, a cooking assistant for cotton fabric, and a mordant for printing and dyeing; In the leather industry is used for leather processing, which can make leather soft, plump, and tough, and has properties such as waterproofing, bending resistance, and wear resistance; In chemical industry sodium Metabisulfite is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc; In the photosensitive industry sodium Metabisulfite is used as a developer, etc.

Package of Sodium Metabisulfite:

Standard packing: 25 Kg plastic woven bag with PE inner/jumbo bag.

Customized packaging accepted.

Loading of Sodium Metabisulfite:

25MT with pallet; 27MT without pallet.

Storage of Sodium Metabisulfite:

Store at a cool, dry, and ventilated storehouse.

The product is with hygroscopicity, packaging should be sealed to prevent air oxidation.

Prohibited to store and transport together with acids, oxidants, and harmful and toxic substances.

Product Inquiry

Contact Form Demo

China Sodium Metabisulfite

Qingdao Tianya Chemical Co., Ltd is the leading manufacturer and supplier of Sodium Metabisulfite in China, we supply top quality Sodium Metabisulfite with top quality. Our Sodium Metabisulfite products have been sold to domestic market and over 100 countries and areas in the world. We supply Sodium Metabisulfite food grade and Sodium Metabisulfite Industrial grade with wide application fields.

 

Get a Quote

Basic Information:

Product Name Sodium Metabisulfite
Appearance White crystalline powder
Synonyms Sodium Pyrosulfite, SMBS
CAS No 7681-57-4
HS Code 28321000
Purity 97% Min
Molecular Formula Na2S2O5
Accurate Mass 189.898254
Water Solubility 540g/L
Grade Industrial Grade/Technical Grade
Package 25 Kg bag/jumbo bag
Production Capacity 300000 Tons/Year

Production Process of Sodium Metabisulfite

1. Crush the sulfur into powder and send it into the combustion furnace with compressed air for self ignition at 600-800℃. The amount of air added is about twice the theoretical amount, generating sulfur dioxide gas with a concentration of 10-13%. After cooling, dust removal, and filtration, sublimated sulfur and other impurities are removed, and the gas temperature is reduced to about 50 ℃, which is then introduced into a series reaction kettle.

2. Add sodium carbonate and water to the reaction kettle, stir to dissolve, and introduce sulfur dioxide gas for reaction until Ph is 4.1 to generate sodium bisulfite solution. The reaction formula is as follows:

Na2CO3+2SO2+H2O=2NaHSO3+CO2

3. Add the mother liquor of sodium bisulfite to the third stage reactor, and then add soda ash solution dissolved in water for neutralization reaction until the pH is 7-8 to generate sodium sulfite solution. The reaction formula is as follows: Na2CO3+2NaHSO3=2NaSO3+CO2↑+H2O

4. The generated sodium sulfite suspension is sequentially passed through the second and first stage reactors to absorb and react with sulfur dioxide until the pH is 4.1, generating sodium bisulfite solution. When the content of sodium bisulfite in the solution reaches saturation concentration, sodium metabisulfite crystals are precipitated, and the reaction formula is as follows: Na2SO3+SO2+H2O=2NaHO2NaHO3→Na2SO5+H2O

The reaction is an exothermic reaction, and the reaction temperature is controlled at about 45 ℃.

5. Sodium metabisulfite crystal slurry transferred from the first stage reactor is transferred to a centrifuge for centrifugation. The mother liquor after centrifugation returns to the reaction kettle in step 2, and wet sodium metabisulfite is sent to a dryer. After drying at 160 ℃, it is the finished product. The reaction exhaust gas is absorbed by alkaline solution and then vented.

Usage of Sodium Metabisulfite Food Grade

Food grade sodium metabisulfite can be used as a bleach and leavening agent for foods such as biscuits and cakes, a nutrient retention agent for vegetable dehydration, a preservative for storing fruits, and a bactericidal and preservative for brewing and beverages. Sodium metabisulfite slowly oxidizes to sodium sulfate when exposed to humid air, accompanied by crystal disintegration. Aqueous solutions decompose in air, especially under heating conditions, and nitrogen should be filled during hot pressing sterilization. Glucose can reduce the stability of aqueous solutions. Stable and effective in acidic solutions. Sodium metabisulfite should be stored in a closed container, away from light, in a cool and dry place.

Usage of Sodium Metabisulfite Industrial Grade

Industrial grade sodium Metabisulfite has a wide range of uses. In the pharmaceutical industry sodium Metabisulfite is used for the purification of chloroform, phenylpropylsulfone, and benzaldehyde production; sodium Metabisulfite is used as a coagulant in the rubber industry; sodium Metabisulfite is used in the printing and dyeing industry as a dechlorinating agent for cotton fabric bleaching, a cooking assistant for cotton fabric, and a mordant for printing and dyeing; In the leather industry is used for leather processing, which can make leather soft, plump, and tough, and has properties such as waterproofing, bending resistance, and wear resistance; In chemical industry sodium Metabisulfite is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc; In the photosensitive industry sodium Metabisulfite is used as a developer, etc.

Package of Sodium Metabisulfite:

Standard packing: 25 Kg plastic woven bag with PE inner/jumbo bag.

Customized packaging accepted.

Loading of Sodium Metabisulfite:

25MT with pallet; 27MT without pallet.

Storage of Sodium Metabisulfite:

Store at a cool, dry, and ventilated storehouse.

The product is with hygroscopicity, packaging should be sealed to prevent air oxidation.

Prohibited to store and transport together with acids, oxidants, and harmful and toxic substances.

Product Enquiry

Contact Form Demo