Use of magnesium hydroxide in production

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Submitted by admin on Mon, 11/19/2018 - 07:19


Magnesium hydroxide, white amorphous powder. The name is caustic soda, light burned magnesia, etc., the suspension of magnesium hydroxide in water is called magnesium hydroxide emulsion, referred to as magnesium milk, the English name is Magnesium hydroxide. Magnesium hydroxide is a colorless hexagonal column crystal or white powder, hardly soluble in water and alcohol, soluble in dilute acid and ammonium salt solution, and the aqueous solution is weakly alkaline. The solubility in water is small, but the water soluble fraction is completely ionized. The concentration of the saturated aqueous solution was 1.9 mg/liter (18 ° C). Heating to 350 ° C loses water to form magnesium oxide. Natural mineral brucite of magnesium hydroxide. Can be used in sugar and magnesium oxide. The following describes some of the use of magnesium hydroxide in production:

1. Magnesium hydroxide is an excellent flame retardant for plastics and rubber products. As a flue gas desulfurizer in environmental protection, it can replace caustic soda and lime as a neutralizing agent for acid-containing wastewater. Also used as an oil additive to protect against corrosion and desulfurization. In addition, it can also be used in the electronics industry, medicine, sugar refining, as insulation materials and in the manufacture of other magnesium salt products.

2. Magnesium hydroxide has excellent buffering performance, reactivity, adsorption force and thermal decomposition performance. It can be used as chemical materials and intermediates, as well as a green environmentally friendly flame retardant and additive for rubber, plastic and fiber. And in polymer materials such as resins. Magnesium hydroxide is mainly used as a flame retardant, an acidic wastewater treatment agent, a heavy metal removal agent, a flue gas desulfurizer, etc. in the environmental protection field.

3. The product can be used as a flame retardant or a flame retardant filler in polyethylene, polypropylene, polystyrene and ABS resin, and has good flame retardant and smoke eliminating effect, and the amount is 40-20 parts. However, it is necessary to treat the surface of the particles with an anionic surfactant, and an anionic surfactant such as an inexpensive higher fatty acid alkali metal salt or an alkyl sulfate or a sulfonated succinate may be used in an amount of about 3%. The product is also used in the manufacture of magnesium salts, the refining of sugar, the pharmaceutical industry, and household chemicals.

4. Magnesium hydroxide is a new type of filled flame retardant. It releases the bound water by thermal decomposition and absorbs a large amount of latent heat to reduce the surface temperature of the synthetic material it fills in the flame, which inhibits polymer decomposition and The effect of cooling the generated combustible gas. The magnesia formed by decomposition is a good refractory material, which can also help improve the fire resistance of the synthetic material, and the water vapor released from it can also be used as a smoke suppressant.

5. This product is also used in the manufacture of magnesium salts, the refining of sugar, the pharmaceutical industry, and daily chemicals. At the same time, the water vapor it emits can also be used as a smoke suppressant. Magnesium hydroxide is an excellent flame retardant with three functions of flame retardant, smoke suppression and filling in the rubber and plastics industry.

6. A milky suspension of magnesium hydroxide is medically used as an antacid and a laxative.