Liquid alkali is liquid sodium hydroxide, also known as caustic soda and caustic sodium. The concentration of liquid alkali in existing chlor-alkali plants is usually 30-32% or 40-42% due to different production processes.

Nature

Pure product is colourless transparent liquid. The relative density is 1.328-1.349, the melting point is 318.4 C, and the boiling point is 1390 C. Pure liquid caustic soda is called liquid alkali and is a colorless transparent liquid. Industrial products contain impurities, mainly sodium chloride and sodium carbonate, and sometimes a small amount of iron oxide. After dissolving into concentrated alkali, most of the impurities will float to the surface and can be separated and removed.

purpose

It is an important basic chemical raw material and has a wide range of uses. Chemical industry is used to manufacture formic acid, oxalic acid, borax, phenol, sodium cyanide and soap, synthetic fatty acid, synthetic detergent, etc. Textile printing and dyeing industry is used as solvent for desizing agent, scouring agent, mercerizing agent, reducing dye and Haichang blue dye. Aluminum hydroxide, alumina and metal surface treatment agent for smelting industry. The instrument industry is used as acid neutralizer, decolorizer and deodorant. Adhesive industry is used as starch gelatinizer and neutralizer. In addition, it is widely used in enamel, medicine, cosmetics, leather, paint, pesticide, glass and other industries.

I. Refining Petroleum

After washing with sulfuric acid, petroleum products also contain some acidic substances which must be washed with sodium hydroxide solution and then washed with water to obtain refined products.

Two. Printing and dyeing

3. Textile fibers

Four, paper making

5. Improve soil with lime.

Chemical industry and chemical reagents.

1, pharmaceutical

Gastric medicine: The ingredients are aluminium hydroxide, magnesium hydroxide, sodium bicarbonate and a small amount of sodium hydroxide. The main effect is to neutralize gastric acid.

Sodium carboxymethyl cellulose (CMC): Emulsification, bonding and film formation of food and medicine. The detergent is used as anti-fouling and redeposition agent. Alkali cellulose was prepared by reaction of refined cotton with NaOH and etherification 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

Alkali aluminium chloride (PAC/BAC) denatures the protein of the virus, and water purification, wastewater treatment, strong sodium oxide adjusts the pH value.

3. Ion Exchange Resin

After the anion exchange resin fails, it is generally regenerated with 5%-8% NaOH solution.

4. Alkaline detergent

NaOH solution can be used for various cleaning agents, such as car wash, bottle wash, detergent, rust remover, disinfectant configuration, mainly used for wine bottle cleaning, ceramic metal industry surface treatment and so on.

5. Sodium hypochlorite bleaching agent

Rubber and Leather

1. Precipitated silica

2. Recycling of Old Rubber

Sodium hydroxide solution was used to pretreat the rubber powder in the recovery of old rubber, and subsequent processing was carried out.

3. Leather

8. Metallurgy, Electroplating

The Role of Other Aspects

1. Ceramic caustic soda plays two roles in ceramic manufacturing. First, caustic soda is used as a diluent in the firing process of ceramics. Second, the surface of ceramics will be scratched or rough. After cleaning with caustic soda solution, the surface of ceramics will be smoother.

2. The instrument industry is used as acid neutralizer, decolorizer and deodorant.