Method for preparing superfine magnesium hydroxide dispersible suspension
A technology of ultra-fine magnesium hydroxide and magnesium hydroxide, applied in magnesium hydroxide and other directions, can solve the problems of large water consumption of pure water, complicated process, complicated preparation method, etc., and achieves easy operation, wide application prospect and simple preparation method. Effect
Inactive Publication Date: 2014-04-02
DALIAN JIAOTONG UNIVERSITY
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Problems solved by technology
However, as the material becomes ultra-fine, strong agglomeration will occur between the particles, which is not conducive to the performance of the product.
[0003] Magnesium hydroxide has multiple preparation methods, but the magnesium hydroxide products prepared by these methods generally have the defects of large particles, easy agglomeration, and difficulty in dispersing, which affect the performance of the product; and the preparation methods are mostly complicated; and the process Complicated, pure water consumes a lot of water, and modifiers need to be added to solve problems such as agglomeration and poor dispersion. This method does not need to add these links, and it is directly realized through the synergistic effect of logistics chemistry in the synthesis process.
Method used
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Embodiment 1
[0024] ① Mix 50ml of 201×7 type strong alkaline anion exchange resin with 0.1mol / L, 100ml hydrochloric acid aqueous solution and soak for 8h, then rinse with tap water to a pH of 6 or more, after draining, use 0.5mol / L, 100ml Soak the sodium hydroxide aqueous solution for 8 hours and then drain it, then soak it with 1mol / L, 100ml sodium hydroxide aqueous solution for 8 hours, then wash with pure water to pH 8-9;
[0025] ②Put the treated anion exchange resin into the exchange column 2 with a retaining resin filter screen, and drain the resin;
[0026] ③Open valve I 31 and valve II31, and suck the 0.1mol / L 40ml magnesium chloride reaction solution into the exchange column 2 through the vacuum pump 1;
[0027] ④ Inhale air through vacuum pump 1 for 2 hours;
[0028] ⑤Close the valve I31 and the valve II32, connect the lower end of the exchange column to the pure water machine, open the valve I 31 and the valve III33, and rinse the magnesium hydroxide into the receiving container 4 with ...
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Abstract
The invention relates to a method for preparing a superfine magnesium hydroxide dispersible suspension. Basic resin serving as a donor template of particle nucleation ions is reacted with magnesium chloride, air is led into a reaction system to enable the reaction system to perform reaction in a vapor-liquid-solid turbulent state, and pure water is used to flush a reactant to obtain the superfine magnesium hydroxide dispersible suspension. The size of the superfine magnesium hydroxide prepared by means of the method is about 100 nm in one-dimensional direction. The preparation method is simple and convenient to operate and has wide application prospect.
Description
Technical field [0001] The invention relates to a preparation method of superfine magnesium hydroxide dispersion suspension. Background technique [0002] As a weak alkali material, magnesium hydroxide is not only a good adsorbent for environmental protection applications, but also because of its high decomposition temperature, good thermal stability, non-toxic, smokeless and smoke suppression characteristics, it can be used as a high-performance inorganic barrier. The fuel is used in polymer materials. Whether it is used as an adsorbent or a flame retardant, the particle size of magnesium hydroxide will affect its application performance. For example, when used as a flame retardant, the particle size decreases, which can improve the filling performance and dispersion performance between it and the polymer, so that the amount of magnesium hydroxide added is greatly reduced, and when the amount of addition is constant, the particle size decreases Smaller, the mechanical and phys...
Claims
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IPC IPC(8): C01F5/14
Inventor 李刚李彦生王莹
Owner DALIAN JIAOTONG UNIVERSITY