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Method for preparing flame retardant magnesium hydroxide by taking industrial grade magnesium hydroxide as raw material

A magnesium hydroxide, industrial-grade technology, applied in the direction of magnesium hydroxide, chemical instruments and methods, magnesium compounds, etc., can solve the problems of wide particle size distribution of final products, high cost, and high particle size requirements of raw materials, so as to avoid environmental pollution And the effect of resource waste, low production cost, and narrow particle size distribution

Pending Publication Date: 2022-05-27
GREEN IND INNOVATION RES INST OF ANHUI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of method that takes technical grade magnesium hydroxide as raw material to prepare flame retardant magnesium hydroxide, to solve the problem that exists in the method for preparing flame retardant magnesium hydroxide by prior art technical grade magnesium hydroxide. The problem of high diameter requirements, high cost, and wide particle size distribution of the final product

Method used

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  • Method for preparing flame retardant magnesium hydroxide by taking industrial grade magnesium hydroxide as raw material
  • Method for preparing flame retardant magnesium hydroxide by taking industrial grade magnesium hydroxide as raw material
  • Method for preparing flame retardant magnesium hydroxide by taking industrial grade magnesium hydroxide as raw material

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Embodiment 1

[0051] A method for preparing flame retardant magnesium hydroxide with technical grade magnesium hydroxide as raw material, comprising the following steps:

[0052](1) Weigh 100g of industrial-grade magnesium hydroxide and 300g of deionized water, add them to a sand mill and grind for 120min to obtain magnesium hydroxide slurry.

[0053] (2) The magnesium hydroxide slurry obtained in step (1) was diluted with water and dispersed in a microwave for 60 min.

[0054] (3) The magnesium hydroxide slurry after microwave dispersion in step (2) is transferred into the autoclave, the temperature of the autoclave is set to 140 ° C, the rotating speed is set to 400 r / min, and the timing is started when the set temperature is reached, After 6 h of reaction, the heating and stirring were turned off.

[0055] (4) After the autoclave is cooled to room temperature, it is filtered, the filter cake is washed with water, the filtrate is recycled in steps (1) and (2), and the filter residue is d...

Embodiment 2

[0057] A method for preparing flame retardant magnesium hydroxide with technical grade magnesium hydroxide as raw material, comprising the following steps

[0058] (1) Weigh 100g of industrial-grade magnesium hydroxide and 500g of deionized water, add them to a sand mill and grind for 120min to obtain magnesium hydroxide slurry.

[0059] (2) The magnesium hydroxide slurry obtained in step (1) was diluted with water and dispersed by ultrasonic for 60 min.

[0060] (3) The magnesium hydroxide slurry after ultrasonic dispersion in step (2) is transferred into the autoclave, the temperature of the autoclave is set to 140°C, the rotating speed is set to 400r / min, and the timing is started when the set temperature is reached, After 6 h of reaction, the heating and stirring were turned off.

[0061] (4) After the autoclave is cooled to room temperature, it is filtered, the filter cake is washed with water, the filtrate is recycled in steps (1) and (2), and the filter residue is drie...

Embodiment 3

[0063] A method for preparing flame retardant magnesium hydroxide with technical grade magnesium hydroxide as raw material, comprising the following steps

[0064] (1) Weigh 100g of industrial-grade magnesium hydroxide and 500g of deionized water, add them to a sand mill and grind for 120min to obtain magnesium hydroxide slurry.

[0065] (2) The magnesium hydroxide slurry obtained in step (1) was diluted with water and dispersed by ultrasonic for 60 min.

[0066] (3) The magnesium hydroxide slurry after ultrasonic dispersion in step (2) is transferred into the autoclave, the temperature of the autoclave is set to 160 ° C, the rotating speed is set to 400 r / min, and the timing is started when the set temperature is reached, After 8 h of reaction, heating and stirring were turned off.

[0067] (4) After the autoclave is cooled to room temperature, it is filtered, the filter cake is washed with water, the filtrate is recycled in steps (1) and (2), and the filter residue is dried...

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Abstract

The invention discloses a method for preparing a flame retardant magnesium hydroxide by taking industrial-grade magnesium hydroxide as a raw material. The method comprises the following steps: (1) mixing the industrial-grade magnesium hydroxide raw material and water to prepare magnesium hydroxide slurry; (2) adjusting the concentration of the magnesium hydroxide slurry; (3) carrying out microwave dispersion on the magnesium hydroxide slurry with the adjusted concentration; (4) carrying out hydrothermal reaction on the magnesium hydroxide slurry subjected to microwave dispersion; and (5) filtering the product in the step (4) to obtain the magnesium hydroxide serving as the flame retardant. According to the invention, common industrial grade magnesium hydroxide can be converted into flame retardant magnesium hydroxide with high added value.

Description

technical field [0001] The invention relates to the field of preparation methods for magnesium hydroxide flame retardants, in particular to a method for preparing flame retardant magnesium hydroxide by using industrial grade magnesium hydroxide as a raw material. Background technique [0002] Magnesium hydroxide is a white amorphous or crystalline inorganic compound, insoluble in water and easily soluble in acid. In recent years, with the increasing demand for halogen-free flame retardants, the advantages of magnesium hydroxide as inorganic flame retardants are particularly prominent. temperature, reducing the possibility of generating flammable substances. Magnesium hydroxide flame retardant has a high decomposition temperature and generates water after decomposition. At the same time, the magnesium oxide generated by the decomposition of magnesium hydroxide is a good refractory material, and can also help improve the fire resistance of synthetic materials. At the same tim...

Claims

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Application Information

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IPC IPC(8): C01F5/14C08K3/22
CPCC01F5/145C01F5/14C08K3/22C01P2002/72C01P2004/03C01P2004/61C08K2003/2224
Inventor 赵鹏程闫东强刘志启陈安琪周自圆李娜
Owner GREEN IND INNOVATION RES INST OF ANHUI UNIV
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