Sodium sulfite anhydrous is used as deoxidizer of boiler water and oil field water injection, deoxidizer of municipal water or industrial water In water treatment field. In water treatment sodium sulfite anhydrous is used for reducing hexavalent chromium into low toxic trivalent chromium, can settle and separate silver and mercury from waste water. Sulphurous acid is more used for medium and small boiler and boiler with pressure operation less than 5.88MPa, usually mixed into 2% to 10% solution. Usually dosage of sodium sulfite anhydrous is 0.076g/L. When using should add the appropriate amount of catalysts, such as the salts of Cu, Co, Mn, Ni, can improve the deoxygenation rate. When the boiler is stopped, can fill by alkaline water deaerator that oxygen removal and 200mg/L sodium sulfite anhydrous, so as to protect metals from corrosion. When remove excess free chlorine from water, sodium sulfite anhydrous should be compounded to use with sodium bisulfite or sulfur dioxide. In addition, as deoxidizer for water injection in oilfield, to add 10mg/L sodium sulfite anhydrous can control dissolved oxygen corrosion for well pipe. In addition, In the chemicals production sodium sulfite anhydrous is used as raw material of sodium hyposulfite production. sodium sulfite anhydrous is also stabilizer for viscose fiber, bactericide for beer bottle, carving agent for glass mirror and slate, fabric bleaching component and deoxidizer, and developer for photographic industry.
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Specifications of Sodium Sulfite Anhydrous Industrial Grade
| Item | HG/T 2967-2000 | ||
| Top Grade | First Grade | Qualified Grade | |
| sodium sulfite (Na2SO3) , % | ≥97.0 | ≥96.0 | ≥93.0 |
| Water-Insoluble | ≤0.02 | ≤0.03 | ≤0.05 |
| Fe,% | ≤0.003 | ≤0.005 | ≤0.02 |
| Free alkali (As content Na2CO3),% | ≤0.10 | ≤0.40 | ≤0.80 |
| Chloride(NaCl), content % | ≤0.10 | – | – |
| Sulfate(As content Na2SO4),% | ≤2.5 | – | – |
Package:
Standard packing: 25 Kg plastic woven bag with PE inner/jumbo bag
Customized packaging accepted
Loading:
25MT with pallet; 27MT without pallet
Storage:
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.
