|Name:||Sodium Sulfate Anhydrous||Other Name:||Viscose Glaber Salt|
|Appearance:||White Crystal Powder||Purity:||99%|
Sodium Sulphate Na2SO4,
7757-82-6 Sodium Sulphate Na2SO4
Sateri Brand Sodium Sulphate Anhydrous 99%Min Na2SO4 Viscose Glaber Salt
Sodium sulfate anhydrous (glauber's salt) is an odorless, bitter-tasting white crystal or powder, soluble in water. It has strong hygroscopicity, and it is easy to absorb moisture in the air and deliquesce when placed in the air, so be sure to seal it before and after use. It is used in leather making, glass making, alkali making industry, etc. It can be widely used in the drying process of various industrial products.
|TEST ITEMS||STANDARD VALUE||TEST VALUE|
|Insolubles in water||0.05% Max||0.01%|
|Ca+Mg (as Mg)||0.15% Max||0.01%|
|Chloride (as Cl)||0.35% Max||0.00%|
|Fe (as Fe)||0.002% Max||0.00%|
1. Vacuum evaporation method: Dissolve the natural Glauber's salt and clarify it, and dehydrate the clarified solution by vacuum evaporation, thickening, centrifugation and drying to obtain anhydrous sodium sulfate.
2. Glauber's salt method: pulverize the glauberite ore, add water to ball mill, leaching, filter the mirabilite solution to remove impurities, clarify the filtrate, then evaporate, dehydrate, centrifuge, and dry to obtain anhydrous sodium sulfate.
3. Conversion method: anhydrous sodium sulfate is prepared by using the high and low temperature salt of the by-product produced by potassium chloride as the raw material. Under certain temperature and batching conditions, through three-stage transformation, magnesium sulfate and sodium chloride are first converted into leonite, then into anhydrous leonite, and finally into anhydrous sodium sulfate. The entire conversion process is a continuous countercurrent operation. The slurry is propelled and lifted mechanically, and the liquid overflows in the reverse direction according to the potential difference. Each stage is connected and influenced by each other. The conversion of the first stage is controlled at a pH value of 3 to 4, and the reaction occurs at a temperature of 55 to 70 °C to generate white sodium. After the magnesia slurry enters the first-stage settler to thicken, it is sent to the second-stage conversion tank; the pH value of the second-stage conversion is 4-5, and the temperature is about 100 °C; the third-stage conversion conditions control the pH value of 5-6, and the temperature is about 55 °C Under stirring, anhydrous sodium bisonite reacts with an aqueous sodium chloride solution to generate anhydrous sodium sulfate, which is centrifuged and dried to obtain anhydrous sodium sulfate. This method has high cost, low recovery rate, consumption of sulfuric acid, difficult removal of impurities, and poor color of the obtained product, but the equipment is simple.
4. Rayon by-product method: Anhydrous sodium sulfate is obtained after rayon solidification waste liquid is crystallized, dissolved, neutralized, filtered, concentrated, cooled, separated and dried.
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