Sodium hydroxide, inorganic compound, chemical formula NaOH, also known as caustic soda, solid alkali. It is a highly corrosive strong base, generally in the form of flakes or blocks, easily soluble in water and forms an alkaline solution. In addition, it is deliquescent, and it is easy to absorb water vapor and carbon dioxide in the air. You can add hydrochloric acid to check whether it has deteriorated.
Classifications
Caustic soda can be divided into liquid caustic soda and solid caustic soda. Liquid caustic soda is referred to as liquid caustic soda, that is, sodium hydroxide solution, which is a colorless and transparent liquid. According to the mass fraction of sodium hydroxide, it can be divided into 30%, 32%, 42%, 45%, 50% liquid caustic soda, etc., Depending on the use of the production process, the general concentration of current market production is 30-32% or 40-42%.
Main appearances of solid alkali are flake or pearls caustic soda. Solid alkali is colorless and transparent crystal, and can be divided into 73%, 95%, 96%, 99%, 99.5% solid alkali according to the mass fraction of sodium hydroxide. Solid alkali has a higher alkali content than liquid alkali. The caustic soda market in my country is dominated by caustic soda, mainly because caustic soda has the advantages of simple production process, low production cost, multiple application scenarios and large market demand.
Applications
As a basic chemical raw material for the national economy, caustic soda has a wide range of uses. It is mainly used for the production of pulp, alumina, soap, dyes, water treatment, rayon, metal smelting, petroleum refining, cotton fabric finishing, and the purification of coal tar products. Food processing, wood processing and machinery industry, chemical industry (preparation of borax, chromium salt, manganate, phosphate, production of polycarbonate, superabsorbent polymer, zeolite, epoxy resin, sodium phosphate, sodium sulfite and large amounts of sodium Salt, pharmaceuticals and organic intermediates, regeneration of old rubber), etc.
Pearl Caustic Soda
Mainly used in textile printing and dyeing clothing, dye chemical industry, coating ink, surface treatment, water quality analysis, environmental protection, food cleaning, toy safety, electronic appliances, printing paper packaging, scientific research institutions and other fields.
Chemical industry, desulfurization, production of detergents, soap, papermaking, oil cleaning agents, man-made fibers and textiles, petroleum refining, food industry, water treatment, metallurgy, disinfection, soil improvement, soap making, metallurgical industry, aluminum hydroxide production, manufacturing ceramics.
Liquid Caustic Soda
Due to different production processes in existing chlor-alkali plants, the concentration of liquid caustic soda is usually 30-32% or 40-42%. Liquid caustic soda is an important basic chemical raw material with a wide range of uses.
In the chemical industry, it is used to manufacture formic acid, oxalic acid, borax, phenol, sodium cyanide, soap, synthetic fatty acid, synthetic detergent, etc.
In the textile printing and dyeing industry, it is used as a solvent for cotton desizing agent, scouring agent, mercerizing agent, vat dye and Haichang blue dye.
Used in the smelting industry to manufacture aluminum hydroxide, alumina and metal surface treatment agents.
In the instrument industry, it is used as an acid neutralizer, decolorizer, and deodorizer. Adhesive industry is used as starch gelatinizer and neutralizer.
In addition, it is widely used in enamel, medicine, cosmetics, leather, paint, pesticides, glass and other industries.
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