Views: 69 Author: Site Editor Publish Time: 2023-08-07 Origin: Site
What is hazardous liquid Caustic soda leakage? What do you need to know about hazardous liquid alkali leakage?
Liquid alkali is the liquid form of sodium hydroxide, also known as caustic soda, caustic soda. Due to the different production processes of existing chlor-alkali plants, the concentration of liquid alkali is usually 30-32% or 40-42%
Pure product is colorless transparent liquid. The relative density is 2.130, the melting point is 318.4℃, the boiling point is 1390℃. There are solid and liquid caustic soda on the market: pure solid caustic soda is white, flake, block, granular and rod, brittle quality; Pure liquid caustic soda is called liquid soda and is a colorless transparent liquid. Industrial products contain more impurities, mainly sodium chloride and sodium carbonate, and sometimes a small amount of iron oxide. When dissolved into a concentrated liquid base, most of the impurities will float on the liquid surface and can be separated and removed. Solid caustic soda has a strong hygroscopic property, easily soluble in water, heat release when dissolved, the resulting solution is strongly alkaline, has a slippery touch and bitter taste, can make the red atmosphere litmus paper blue, make the phenolphthalide solution red. Also soluble in ethanol and glycerol, insoluble in acetone, ether, acetic acid. When they meet with acid, they neutralize and form salt and water. It has the ability to saponify oil and produce soap and glycerin. It is very easy to absorb carbon dioxide and water in the air into carbonates.
Liquid alkali has two kinds of solid and liquid: pure solid caustic soda is white, block, flake, rod, granular, brittle; Pure liquid caustic soda is colorless transparent liquid. Sodium hydroxide is also soluble in ethanol and glycerol. But insoluble in ether, acetone, liquid ammonia. Sodium hydroxide, also known as lye or caustic soda, has the molecular formula Na OH and is a highly corrosive metal base. It is a white solid that can be in pill, flake or granular form, although sometimes it is in the form of a 50% saturated solution.
Disproportionation reaction occurs with halogens such as chlorine, bromine and iodine. It reacts with metal aluminum and zinc and non-metal silicon and boron to release hydrogen. It is highly corrosive and has corrosive effect on skin, fiber, glass, ceramics, etc. Pure sodium hydroxide is white and feathery opaque solid crystal, and general industrial products contain a small amount of sodium chloride and sodium carbonate, which is white and slightly light-colored luster solid crystal. Sodium hydroxide is one of the strongest bases and reacts with acids to form sodium salts. Sodium hydroxide is very hygroscopic, placed in the air can absorb a lot of water and delixing into liquid alkali.
It is an important chemical basic raw material and has a wide range of uses. Chemical industry for the manufacture of formic acid, oxalic acid, borax, phenol, sodium cyanide and soap, synthetic fatty acids, synthetic detergent and so on. Textile printing and dyeing industry used as cotton desizing agent, boiling agent, mercerizing agent and reduction dye, Haichang blue dye solvent. Manufacturing aluminum hydroxide, aluminum oxide and metal surface treatment agent for smelting industry. The instrument is used in industry as acid neutralizer, decolorizing agent and deodorizing agent. Adhesive industry used as starch gelatinizer, neutralizer. In addition, it is widely used in enamel, medicine, cosmetics, leather, paint, pesticide, glass and other industries.
1, Refined petroleum
After the petroleum products are washed with sulfuric acid, some acidic substances must be washed with sodium hydroxide solution and then washed to obtain refined products.
2. Printing and Dyeing
3, textile fibers
4. Paper Making
5. Use lime to improve acidic soil.
6. Chemicals and chemical reagents.
Stomach medicine: The ingredients are aluminum hydroxide, magnesium hydroxide, sodium bicarbonate and a small amount of sodium hydroxide, the main role is to neutralize stomach acid.
Sodium carboxymethyl cellulose (CMC) : Emulsification, bonding, film formation of food and medicine. Used as an anti-fouling redeposition agent in detergents. Alkali cellulose is prepared by the reaction of refined cotton with NaOH, and then etherified with chloroacetic acid in one step.
2, green water treatment agent
Preparation of sodium ferrate (Na2FeO4)
3NaClO(Sodium hypochlorite)+2Fe(OH)3(ferric hydroxide)+4NaOH==2Na2FeO4+3NaCl+5H2O
Basic aluminum chloride (PAC/BAC) denatures the proteins of the virus. And water purification, wastewater treatment, strong sodium oxide to adjust the ph value.
3, ion exchange resin
After anion exchange resin failure, it is generally regenerated with 5%-8% NaOH solution
4, alkaline cleaning agent
NaOH solution can be used for a variety of cleaning agents, such as car wash liquid, bottle washing agent, detergent, rust remover, disinfectant configuration, mainly used for wine industry bottle cleaning, ceramic metal industry surface treatment and so on
5, sodium hypochlorite bleach
7, rubber, leather
1, precipitate white carbon black
2, old rubber recycling
The rubber powder was pre-treated with sodium hydroxide solution in the recovery of old rubber, and then the subsequent processing was carried out.
8, Metallurgy, electroplating
9 ,The role of other aspects
1. The role of ceramic caustic soda in ceramic manufacturing has two points, first, in the firing process of ceramics, caustic soda as a diluent. Second, the surface of the fired ceramic will be scratched or very rough, and after cleaning with caustic soda solution, the ceramic surface will be smoother.
2. The instrument is used in the industry as an acid neutralizer, decolorizing agent and deodorizing agent.
Caustic soda is a class I inorganic alkaline corrosive goods, hazard code number: 82001. Liquid alkali is transported by tank car or tank; Industrial solid alkali can be packed in iron drums or other closed containers with a net weight of 200kg per barrel and a tablet of alkali of 25kg. There is a "corrosive article" mark on the package. Store in a dry and ventilated place. Fire can be put out with water, yellow sand and various fire extinguishers.
Caustic soda is extremely corrosive, the skin should be immediately washed with water, splashed into the eyes should be immediately washed with water or saline for 15 minutes, in serious cases sent to the hospital for treatment.
Engineering control closed operation. Safety shower and eye washing facilities are available.
Personal protection may be exposed to its dust, must wear a headcover-type electric supply air filter dust respirator. Wear an air respirator if necessary. Wear rubber acid-proof clothing. Wear rubber acid and alkali resistant gloves.
Smoking, eating and drinking are prohibited at other work sites. Wash hands before meals. After work, shower and change. Pay attention to personal hygiene.