Preparation method of highly pure magnesium hydroxide nanocrystal

A magnesium hydroxide and nanocrystalline technology, applied in the direction of magnesium hydroxide, can solve the problems of poor filtration performance, poor crystallinity, strong volatility of ammonia water in the operating environment, etc., and achieve the effect of facilitating mass production and low autoclave pressure
CN101565193AInactive Publication Date: 2009-10-28HENAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN UNIV OF SCI & TECH
Publication Date
2009-10-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of highly pure magnesium hydroxide nanocrystal, which comprises the steps of: mixing and evenly stirring NaOH solution and MgCl2.6H2O solution at room temperature, transferring the mixed material into a high-pressure reaction autoclave and heating to temperature of 124 DEG C to 135 DEG C, keeping the pressure at 0.20 Mpa to 0.32Mpa, then preserving the temperature for 3 hours to 5 hours, naturally cooling and aging, rinsing and suction-filtering the aged solid-liquid mixture on a Buchner funnel, drying the products after suction filtration in a drying oven, cooling and grinding the products, adding the obtained magnesium hydroxide nanocrystal to clean water, stirring, conducting ultrasonic processing and standing; and in such synthesis way, the magnesium hydroxide nanocrystal with purity of 99.2 percent to 99.9 percent, a shape of a hexagonal piece and granule size of 50nm to 100nm can be obtained.
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Description

technical field

[0001] The invention relates to the technical field of preparation of high-purity nanometer materials, in particular to a preparation method of high-purity magnesium hydroxide nanocrystals. Background technique

[0002] With the continuous expansion of the application field of plastics, it has brought unexpected dangers and losses to human beings due to its flammability and high calorific value. Some time ago in the earthquake-stricken area of ​​Wenchuan, there was an incident that the fire-proof and flame-retardant performance of the temporary housing was exposed. Recently, the people in the country are deeply remembered. The north annex of the TV station's new building burned for nearly six hours before being extinguished, which highlighted the urgent problem that the flame retardancy of my country's building decoration materials is not up to standard. Throughout the developed countries, people have always paid great attention to and emphasized the flame re...

Claims

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