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Soda ash

Soda ash, scientific name sodium carbonate, is an important basic chemical raw material, commonly known as block alkali, stone alkali, soda (Soda), and mouth alkali (historically, it was generally transported nationwide through Zhangjiakou and Gubeikou, hence the term "mouth alkali") Sodium carbonate is a white powder or particle at room temperature. No odor. It is a strong base and weak acid salt. Has water absorption. Gradually absorb 1mol/L of water (about 15%) in exposed air. Decompose and effervescent when exposed to acid. Soluble in water (3.5 parts at room temperature and 2.2 parts at 35 ℃) and glycerol, insoluble in ethanol. The aqueous solution is strongly alkaline with a pH of 11.6. Relative density (25 ℃) 2.53. Melting point 851 ℃. Half lethal dose (30 days) (mouse, abdominal cavity) 116.6mg/kg. It is stimulating. It can be formed by a chemical reaction between sodium hydroxide and carbonic acid. The solution is alkaline.

1. Used for the production of papermaking and cellulose pulp;

2. Used for the production of soap, synthetic detergents, synthetic fatty acids, and the refining of animal and plant fats.

3. Used in the textile printing and dyeing industry as a cotton fabric desizing agent, cooking agent, and mercerizing agent.

4. The chemical industry is used to produce borax, sodium cyanide, oxalic acid, phenol, etc.

5. The petroleum industry is used for refining petroleum products and in oilfield drilling mud. It is also used for surface treatment in the production of alumina, metallic zinc, and metallic copper, as well as in glass, enamel, leather making, pharmaceuticals, dyes, and pesticides.

6. Food grade products are used in the food industry as acid neutralizers, can be used as peelers for citrus fruits, peaches, etc., can also be used as detergents for empty bottles, cans, and other containers, as well as decolorizers and deodorizers.

7. It can also be used as an alkaline desiccant. Soda is widely used in the national economy, and many industrial sectors require it. The department that uses caustic soda is the manufacturing of chemicals, followed by papermaking, aluminum smelting, tungsten smelting, artificial silk, artificial cotton, and soap manufacturing. In addition, in the production of dyes, plastics, pharmaceuticals, and organic intermediates, the regeneration of old rubber, the electrolysis of metal sodium and water, and the production of inorganic salts, a large amount of caustic soda is also used to produce borax, chromium salts, manganese salts, phosphates, etc.

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