Sodium metabisulfite is white or yellow crystalline powder or little crystals with a strong SO2 smell. The aqueous remedy is acidic. When touching solid acid, SO2 will be launched to develop matching salts. It will be oxidized to Na2S2O6 when positioned in the air for a very long time, so this item can not be utilized. long-lived.
Sodium Disulfite Property
Melting point
>300 °C (lit.)
density
1.48
storage temp.
Store at +5°C to +30°C.
solubility
540 g/L (20°C)
form
Powder/Solid
Specific Gravity
1.48
color
White to slightly yellow
PH
3.5-5 (50g/l, H2O, 20℃)
Odor
Sulphorous
PH Range
4.5 at 50 g/l at 20 °C
Water Solubility
540 g/L (20 ºC)
Sodium Disulfite Uses
Sodium Disulfite is used as preservative, whitening representative and also loosening up agent in food handling. Industrially, salt pyrosulfite is made use of in printing and also dyeing, natural synthesis, printing, sun tanning, pharmaceutical and also other departments; salt pyrosulfite is used in the chemical and also pharmaceutical industries to produce hydrosulfite, sulfamethazine, caprolactam, and so on, as well as chloroform as well as phenylpropyl sulfone and purification of benzaldehyde. The photographic sector is utilized as a component in the fixer. The scent sector is utilized to produce vanillin. It is made use of as chemical in brewing industry, rubber coagulant as well as dechlorination agent after bleaching cotton cloth. Organic intermediates, dyes, as well as tanning are made use of as lowering representatives for electroplating, wastewater treatment in oil fields, and also mineral processing agents for mines.
Sodium Disulfite is a great deal a lot more highly reducing than bisulfite, and also its result resembles that of salt sulfite. my country defines that it can be made use of in sweet fruit, biscuits, sugar, rock sugar, maltose, sweet, sugar, liquid sugar, bamboo shoots, mushrooms and also tinned mushrooms, with a maximum use 0.45 g/kg.
Production Process of Sodium Disulfite
Contents of the invention
Detailed ways
Contents of the invention
The item of today development is to provide a type of high yield, reduced power usage Sodium Disulfite production procedure, to resolve the troubles raised in the above-mentioned history modern technology.
For realizing the above object, the present invention provides complying with technical scheme: A type of production method of Salt Disulfite, its handling step is as complies with: (1) SO Synthesis: in SO In the producing heating system, the sulfur powder response of air as well as fluidization creates SO High temperature gas, Likewise produce a small amount of SO3 and sulfur vapour, SO in the blended gas The content is 13 ～ 18%, and also the pressure during normal operation in the SO2 creating heater is 0.80 ～ 0.90 Kgf; (2) cleaning purification: the SO2 blended gas is passed into clear water Washing, eliminate SO3 and also sulfur vapor in the mixed gas, produce the sulfuric acid drainage that pH is 1 ～ 2; It is 96 ～ 98%, mix frequently with agitator in the absorption procedure, SO2 responds with Na2CO3 in the service as well as generates sodium metabisulfite and carbon dioxide, and the waste gas after taking in is discharged into the environment with the exhaust pipe; (4) Centrifugal drying: after absorbing The blended option is centrifuged, the centrifuged mother alcohol is returned to the activator for further usage, and the centrifuged solid is countercurrently dried out with indirect hot air from the SO2 generator; (5) Healing as well as blood circulation: the dried hot air goes into the cyclone The separator recuperates sodium pyrosulfite fragments, and also a really percentage of great sodium pyrosulfite fragments goes into the swirling plate tower with hot air for washing as well as dirt removal. The option is Na2CO3 service, and also the dedusting waste liquid is recycled for many times and after that went back to the activator to be recycled as mom alcohol.
Detailed ways
The technical solutions in the embodiments of today development will certainly be clearly and also totally explained below along with the accompanying drawings in the personifications of the here and now development. Obviously, the described personifications are only several of the personifications of the here and now innovation, not every one of them. Based upon the embodiments of the here and now innovation, all other embodiments acquired by individuals of normal skill in the art without making imaginative initiatives belong to the security range of today development.
Salt Disulfite artificial course map Please refer to Fig. 1, in the embodiment of the here and now creation, a type of manufacturing strategy of Sodium Disulfite adopts batch mode of operation to execute, as well as its handling action is as adheres to: (1) SO Synthesis: in SO In the creating heating system, air reacts with the sulfur powder of fluidization Produce SO2 high-temperature gas, additionally generate a small amount of SO3 and also sulfur vapour, SO2 content is 15 ～ 16% in the combined gas, as well as the stress throughout regular work in the SO2 creating furnace is 0.85 Kgf; (2) washing filtration: SO2 blended gas Feed into clear water for washing, remove SO in the blended gas and sulfur vapor and decrease the temperature level of the mixed gas to create sulfuric acid drainage with a pH value of 1 to 2; (3) salt metabisulfite synthesis: the washed gas is entered the synthesis pot Three-stage collection absorption is performed. The absorption fluid is Na2CO3 service. SO2 reacts with Na2CO3 in the solution to develop sodium metabisulfite and also CO2. Throughout the absorption procedure, stir constantly with a stirrer to strengthen material mixing. The absorption rate of each stage is 97%. After absorption The focus of SO2 in the tail gas is 11.55 mg/m3, and also the exhaust gas after the three-stage series absorption mostly includes carbon dioxide and also N2, which is discharged right into the environment through an exhaust pipe with a diameter of 0.2 m and also a height of 15m; (4) Centrifugal Drying: Centrifuge the soaked up blended solution, return the centrifuged mom alcohol to the activator for more usage, and use the indirect hot air from the SO2 generator for countercurrent drying of the centrifuged strong; (5) Healing and flow: after drying The hot air goes into the cyclone separator to divide as well as recoup sodium pyrosulfite bits. A really small amount of fine salt pyrosulfite particles enters the swirling plate tower with hot air for cleaning and also dust removal. Given that salt pyrosulfite powder is very soluble in water, the concentration of salt pyrosulfite dirt in the released completely dry exhaust gas is ensured. Below 120mg/m3, the concentration of SO2 goes down below 850mg/m3, the temperature of the exhaust gas after dust elimination is 60 ° C, and also the exhaust gas is released into the ambience via an exhaust pipe with an inner size of 0.325 m as well as an elevation of 15m, and the swirl
plate The dedusting solution of the tower is Na2CO3 service, and the dedusting waste fluid is recycled for often times and after that went back to the activator to be recycled as mom alcohol.
Sulfur powder burns in the SO2 generator and also launches a great deal of heat, cooling down with air, on the one hand, helps to decrease the temperature of the heating system wall and lengthen the service life of the heater body, on the other hand, the warmed air is used for drying out of sodium pyrosulfite.
The role of Sodium Disulfite in the Treatment of Chromium-Containing Wastewater
1. Sedimentation tank pretreatment By means of natural sedimentation or centrifugal sedimentation, the metal dross in the electroplating wastewater is precipitated to facilitate the next step of treatment.
2. Comprehensive wastewater reaction pool Precipitate the main chromium element in the wastewater by adding medicine (such as adding heavy metal scavenger).
3. Inclined plate settling plate settlement Most of the metal ions exist in the solution in flocculent form. Therefore, the solution needs to be settled through the inclined plate settling plate.
4. Filtration treatment in the filter tank After the inclined plate sedimentation treatment, there is still a small amount of flocculent precipitate mixed in the solution. At this point, the solution needs to be sent to a valveless filter for filtration.
About Products: If you need Sodium Disulfite as a cosmetic raw material, please contact our service staff directly, and we will provide you with high-quality products at the best price. As an experienced Sodium Disulfite manufacturer and supplier, ZSpharmac will provide Sodium Disulfite raw materials to customers all over the world for a long time. Over the years, the company has been adhering to the spirit of “integrity management, strict quality control, customer first”, and has won unanimous praise from domestic and foreign customers
Company Profile and Corporate Culture
Company Profile：
ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .
The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .
The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.
Corporate Culture：
OUR MISSION Help China Chemicals to benefit the happiness of human life OUR VISSION Become the most trusted chemical supplier in the world OUR BUSINESS PHILOSOPHY Striver – oriented, enrich employees, customer first, deep service, seek development OUR VALUES Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight
About Us
The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.
“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.
Company Info
Business Type: Manufacturer
Product Range: Cosmetic raw materials
Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.
Service
Pre-Sales Service
* Prompt reply and 24 hours online, professional team to provide best price and high quality product.
* Sample testing support.
* Every batch of products will be tested to ensureits quality.
*The packing also can be according the customers` requirment.
*Any inquiries will be replied within 24 hours.
*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
After-Sales Service
*The fact of logistics information monitoring.
* Any questions about the product can be consulted at any time.
*Product has any problem can return.
FAQ
Do you accept sample order?
We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.
HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?
You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
What’s your MOQ?
Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
Do you supply product report?
Yes. We’ll give you product analysis report before shipping.
Is there a discount?
Different quantity has different discount.
Shipping
1. ≤50kg, Express delivery recommended, usually called as DDU service;
2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;
3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;
4. For high value products, please select air shipping and express delivery for safe.
