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Preparation process of highly dispersed magnesium hydroxide

Hebei Messi Biology Co., Ltd. stated that Qalhan Salt Lake in Qinghai is the only potassium and magnesium salt deposit in my country. Soluble potassium salt accounts for more than 97% of the country’s potassium salt resources, and magnesium reserves are ten times that of potassium salt. Obviously, Qarhan Salt Lake is very rich in magnesium salt resources. In order to make full and effective use of salt lake magnesium salt resources, during the “Sixth Five-Year Plan” and “Seventh Five-Year Plan” periods, some research units have carried out fruitful work and developed a series of magnesium salt products, promoting the development and utilization of magnesium salt resources. On the basis of existing work, carrying out research on the preparation of highly dispersed magnesium hydroxide and magnesium oxide will be of great significance in promoting potassium salt production and comprehensive utilization of salt lake magnesium resources.

Highly dispersed magnesium hydroxide with a particle size of 0.5-2.0μm and a specific surface area of ​​10-30m2/g is mainly used as a flame retardant for polymer materials. Its main advantage is a high decomposition temperature, so when some thermoplastic materials require higher When processing at high temperatures (200°C), using magnesium hydroxide as a flame retardant can avoid the qualitative change of the plastic caused by the decomposition of the flame retardant during processing, thereby reducing the risk of fire. Magnesium hydroxide mixed with other preparations can not only improve the heat resistance of polymer materials, but also improve their other properties, such as mechanical strength, softening temperature, product surface brightness, insulation properties, antistatic properties, etc.

Flame Retardant Magnesium Hydroxide

Magnesium hydroxide also has good heat insulation properties. For example, a transparent plastic film containing 1-23% magnesium hydroxide has good heat insulation effect, and the heat insulation effect is obvious when used as a greenhouse material.

Highly dispersed magnesium hydroxide can also be used as an insulating protective layer for transformer steel. Highly dispersed magnesium oxide is mainly used as a filler and reinforcing agent in rubber and plastic products, as an acid suppressor in medicine, as a catalyst in the chemical industry, and as raw materials for manufacturing other magnesium compounds, ceramics, enamels, glass, etc., and as a raw material for asbestos fireproof cloth. Filling, insulation materials, etc. To sum up, highly dispersed magnesium hydroxide and magnesium oxide are inorganic materials with heat resistance, heat insulation, insulation and reinforcement.

Hebei Messi Biology Co., Ltd. stated that with the continuous development of magnesium hydroxide product categories, it will have wider application prospects, so conducting research on highly dispersed magnesium hydroxide and magnesium oxide is an important way to utilize magnesium salt resources. one. High-purity magnesium hydroxide and magnesium oxide are very important chemical products, but it is difficult to prepare high-quality and cheap industrial products using current methods, and their application scope is limited. In order to find a better method, we chose magnesium chloride from the Qarhan Salt Lake, which has very abundant reserves, as the main raw material and conducted research on a new process. The purpose was to obtain and prepare magnesium hydroxide precipitates with good filtration and washing properties. Produce highly dispersed magnesium hydroxide and magnesium oxide with high purity and low cost.

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