Production process and safety protection of caustic soda

It is commonly known as caustic soda, sodium hydroxide, caustic soda, caustic soda, sodium hydroxide, colorless transparent crystal, the relative density is 2.130. The melting point is 318.4 degrees centigrade. The boiling point is 1390 degrees centigrade. There are two kinds of solid and liquid products sold in the market: pure solid caustic soda is white, there are block, flake, rod, granular and crisp, pure liquid caustic soda is colorless and transparent liquid. Solid caustic soda has a strong hygroscopicity. Soluble in water, dissolving heat, alkaline aqueous solution, soapy; soluble in ethanol and glycerol; insoluble in acetone, ethyl ether. It has strong corrosivity and has a corrosive effect on fiber, skin, glass, ceramics and so on. React with metal aluminum and zinc, non-metal boron and silicon to release hydrogen, react with chlorine, bromine, iodine and other halogens, form salts and water with neutralization of acids. White translucent sheet solid sodium hydroxide, as the basic chemical raw materials, widely used in papermaking, synthetic detergent and soap, viscose, rayon and cotton and textile industry, pesticides, dyes, rubber and chemical industry, oil drilling, oil refining oil and tar refining oil industry and national defense industry, machinery industry, wood processing, metallurgical industry, medicine industry and city construction. It is also used in the manufacture of chemicals, paper, soap and detergent, rayon and cellophane, alumina processing, and mercerizing and water treatment of textiles. Molecular formula: NaOH shape: characters translucent white flake solid sodium hydroxide, industrial grade sodium hydroxide according to the national standard (GB209-2006) requirements, allowing the microstrip color, this is the impurity color in sodium hydroxide. National standard: sodium hydroxide (GB209-2006) on the national standard of solid sodium hydroxide (including flake, lump, granular) part of the standard quality standard: sodium hydroxide: 99 sodium hydroxide (IS-IT- 1) or sodium hydroxide sodium carbonate and sodium chloride is less than less than or equal to 99 superior product Fe2O3 0.5 0.03 0.005 0.8 grade 98.5 0.05 0.008 qualified 98 1 0.08 0.01

96 sodium hydroxide or sodium hydroxide (IS-DT- 1) sodium carbonate = sodium chloride is less than or equal to less than 96 Fe2O3 superior product 1.2 2.5 0.008 first 96 1.3 2.7 0.01

Qualified 95 1.6 3 0.02 injection IS: IT solid sodium hydroxide: usually refers to the ion exchange membrane method for the production of sodium hydroxide, but not limited to this process. DT: usually refers to the sodium hydroxide produced by the diaphragm process, but is not limited to this process. Tongjiuda uses sodium hydroxide: 1. for paper, cellulose pulp production; 2. for soap, synthetic detergent, synthetic fatty acid production and oil refining plants and animals. 3. textile printing and dyeing industry as cotton desizing agent, scouring agent and mercerizing agent. 4. chemical industry for the production of borax, sodium cyanide, phenol, oxalic acid, etc.. 5. petroleum industry for refined petroleum products, and for oil drilling mud. It is also used for the production of surface treatment of alumina, metal zinc and metal copper, as well as glass, enamel, leather, medicine, dyes and pesticides. 6. food products are used as neutralizing agent in the food industry, can be used for peeling agent orange, peach, also can be used as empty bottles, cans and other containers of detergent, and decoloring agent, sweetening agent. 7. can also be used as alkaline desiccant. Caustic soda is widely used in the national economy, and caustic soda is needed in many industrial sectors. Most of the use of caustic soda is the manufacture of chemicals, followed by paper making, aluminum smelting, tungsten smelting, rayon, artificial cotton and soap manufacturing. In addition, in the production of dyes, plastics, pharmaceutical and organic intermediates, old rubber regeneration, metal sodium, the electrolysis of water and inorganic salt production, preparation of borax, chromium salt, manganese salt, phosphate, also want to use a lot of caustic soda. Sodium hydroxide in water treatment industry are widely used as neutralizing agent, various salt manufacturing, soap, paper, cotton, silk, viscose fiber, rubber regeneration, metal cleaning, electroplating, bleaching and other widely used in chemical industry. Sodium hydroxide has strong corrosion resistance, and it has special requirements for the safety protection of sodium hydroxide. On sodium hydroxide workers are the most susceptible to harm the sodium hydroxide crowd, these employees before they start to wear protective clothing, gloves and goggles and masks, and require the company to provide a safety shower and eyewash equipment. Sodium hydroxide is easy to leak in the process of production, and it should be treated with emergency treatment for the leakage of sodium hydroxide. Isolate the contaminated area and limit the entry and exit. It is suggested that the emergency treatment personnel wear dust respirators and wear anti acid and alkali clothes. There is no contact with broken containers and leaks before wearing proper protective clothing. Cut off the leakage source as much as possible. The spill covered with plastic sheeting, reduce dispersion. Do not enter the water into the packing container. Collect leaks with clean shovels, put in a clean, dry, looser container, and move the container away from the leakage area.


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