The Use of Yuanming Powder in Industry

Yuanming powder, also known as anhydrous sodium sulfate, is a salt formed by the combination of sulfate ions and sodium ions. Its chemical formula is Na2SO4. Sodium sulfate is soluble in water and its solution is mostly neutral, soluble in glycerol but insoluble in ethanol. Inorganic compounds, high-purity, fine-grained anhydrous substances are called yuanming powder. This substance can be used for both medicine and industrial production. Mainly used in the manufacturing of glass, enamel, pulp, refrigeration mixtures, detergents, desiccants, dye diluents, feed, leather making, anti-corrosion of oil and gas pipelines, metal smelting, surface treatment, fillers and other industries.

The Use of Yuanming Powder in Industry
1. The glass industry uses it as a solvent instead of soda ash.
2. The chemical industry is used to manufacture sodium sulfide, sodium silicate (sodium silicate), and other chemical products.
3. The textile industry is used to mix Vinylon spinning coagulants.
4. The washing industry uses fillers for synthesizing detergents.
5. A cooking agent used in the papermaking industry to produce sulfate pulp.
6. Used in non-ferrous metal metallurgy, leather, and other fields.
7. It can be used as a buffer in sulfate zinc plating to stabilize the pH value of the plating solution.
8. Used for producing powder concrete admixtures and cement admixtures.
9. In organic synthesis laboratories, it is the most commonly used post-treatment desiccant.
10. Used as analytical reagents, such as dehydrating agents, digestion catalysts for nitrogen determination, and interference inhibitors in atomic absorption spectroscopy analysis.
11. It can be used as a buffer in sulfate zinc plating to stabilize the pH value of the plating solution.
12. Used as a feed additive for livestock and poultry. Sulfur is one of the essential mineral elements in animal bodies.
13. The use of sodium sulfate in the dye industry:
① When using direct dyes, sulfur dyes, vat dyes, and indigo dyes to dye cotton, sodium sulfate can be used as a dyeing promoter. These dyes are easily soluble in the formulated dye solution, but they are not easy to dye cotton fibers. Due to the difficulty of absorbing dye completely, there is a lot of residual dye in the foot water. Adding Yuanming powder can reduce the solubility of dyes in water, thereby increasing their coloring power. In this way, the amount of dye used can be reduced, and the resulting color can be deepened.
② As a direct dye silk dyeing retarder, the application of direct dyes on protein fibers is mainly focused on silk dyeing, resulting in better dyeing fastness than general acidic dyes. Some direct dyes also have excellent discharge properties, so they are often used as discharge colors in silk fabric printing. Direct dyeing of silk often involves adding a small amount of gelatin, but the role of gelatin here is different from that of dyeing cotton, only serving as a dyeing retarder.
③ When using acidic dyes to dye animal fibers such as silk and wool, sulfuric acid and acetic acid are often added to promote the coloring of pigment acids. However, anhydrous sodium sulfate is also added as a dyeing retarder.
④ As a ground color protector for printing silk fabrics during refining, the dye may peel off during printing or dyeing, causing contamination of the ground color or other fabrics of the same process. Adding anhydrous sodium sulfate can reduce the solubility of the dye, thus avoiding the risk of staining the ground color due to dye peeling.
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