Sodium Sulfite Raw Materials powder

CAS:7757-83-7

MF:Na2O3S

MW:126.04

EINECS:231-821-4

Specification​: 99% min Sodium Sulfite powder

Sample:Sodium Sulfite powder

Packaging:1kg/bag, 25kg/drum

Brand: Henrikang

Appearance: White

Storage: Cool Dry Place

Shelf Life: 2 Years

Test Method: HPLC

Sodium Sulfite powder Usage and Synthesis.

Anhydrous sodium sulfite is used as a developer, in the preparation of cellulose sulfite esters, in the preparation of sodium thiosulfate, as a preservative for dried fruits and meats, as a deoxidizing agent in the dyeing and printing industry, and as a reducing chemical reagent in chemical and laboratory production and synthesis.

Uses and functions of Sodium Sulfite powder.

Reducing bleach, bleaching effect on food and strong inhibition of oxidizing enzyme in plant food.

China stipulates that it can be used in candied fruit with the maximum use level of 2.0g/kg; it can also be used in glucose, liquid glucose, table sugar, rock sugar, caramel, candy, bamboo shoots, canned mushrooms and mushrooms, grapes and blackcurrant juice concentrate with the maximum use level of 0.60g/kg.

Residues of bamboo shoots, canned mushrooms and mushrooms, candied fruit, grapes and blackcurrant juice concentrate (as SO2) ≤ 0.05g/kg; residues of potato starch ≤ 0.03g/kg; residues of cookies, sugar, vermicelli and other varieties are less than 0.1g/kg; and residues of liquid dextrose shall not exceed 0.2g/kg.

Anhydrous sodium sulfite can be used as man-made fiber stabilizer, fabric bleaching agent, photographic developer, dyeing and bleaching deoxidizer, spice and dye reductant, papermaking lignin remover, etc.: it can be used as deoxidizing agent and bleaching agent in printing and dyeing industry, and used in the boiling of all kinds of cotton fabrics, which can prevent the local oxidation of cotton fiber from affecting the strength of the fiber and improve the whiteness of boiled products.

It can also be used to make cellulose sulfite ester, sodium thiosulfate, organic chemicals, bleaching fabrics, etc. It is also used as a reducing agent, antiseptic, dechlorinating agent.

It is used for trace analysis and determination of tellurium and niobium and preparation of developing solution, also used as a reducing agent, and used as a developing agent in photographic industry. Used as reducing agent in the production of m-phenylenediamine, 2,5-dichloropyrazolone, anthraquinone-1-sulfonic acid, 1-amino anthraquinone, sodium aminosalicylate, etc. in organic industry, which can prevent the oxidation of semi-finished products in the reaction process.

Used as reducing agent in the production of dehydrated vegetables. Used as lignin remover in paper industry. Used as stabilizer for man-made fibers in textile industry.

Used as general analytical reagent and photoresistor material, used in the electronic industry for the manufacture of photoresistors. Used as electroplating wastewater and drinking water treatment in water treatment industry.

Preparation of action of Sodium Sulfite powder.

Sodium sulfite can be produced by passing sulfur dioxide into sodium hydroxide solution, and when sulfur dioxide is in excess, sodium bisulfite is produced. Or to the sodium carbonate solution into the sulfur dioxide gas, saturated and then added to the sodium carbonate solution, the crystal precipitation of heptahydrate crystals, heating and dehydration is anhydrous sodium sulfite.

Product Method of Bulk Sodium Sulfite powder.

S0z-containing gas generated by the combustion of sulfur into the absorption tower with a relative density of 1.21 (25 ° Bè) soda ash solution countercurrent absorption, the resulting sodium bisulfite solution Ph value of 5 ~ 6, in the neutralization tank with a relative density of 1.21 soda ash solution neutralization to slightly acidic, and then heated to 102 ° C or more;

Then add the relative density of 1.19 caustic soda solution neutralization to Ph value of 11 ~ 12, to remove iron, while getting sodium sulfite solution; neutralization solution by vacuum (26.7kPa) evaporation and concentration, crystallization and separation, 250 ~ 300 ℃ air drying to remove the water of crystallization that is the product.