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Method for synthesizing flame retardant of magnesium hydroxide

A technology of magnesium hydroxide and synthesis method, applied in directions such as magnesium hydroxide, can solve problems such as particle size is not easy to control, magnesium hydroxide particle size is coarse, etc.

Active Publication Date: 2009-07-01
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The relevant patents CN01134059.2, CN200410067540.8, 03134189.6 and 02133360.2 were consulted. The conventional precipitation method and natural brucite preparation were mainly used. The particle size of the produced magnesium hydroxide was relatively coarse, and the particle size was not easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] First prepare an aqueous magnesium sulfate solution with a concentration of 8g / L, take 200mL in a polytetrafluoroethylene cup, add the same volume of 10g / L aqueous sodium hydroxide solution, and 10mL of 0.5g / L sulfonated glutarate, After stirring, quickly place it in a microwave reactor, control the power of the reactor to 200W, and the reaction time is 15min, then cool, filter, wash twice with deionized water, dry in vacuum at 105°C for 2 hours, and observe by SEM to obtain The particle diameter of the magnesium particles was 2 μm.

Embodiment 2

[0011] First prepare a magnesium sulfate aqueous solution with a concentration of 20g / L, take 200mL in a polytetrafluoroethylene cup, add the same volume of 25g / L sodium hydroxide aqueous solution, and 10mL of 0.5g / L sulfonated glutarate, stir Then put it in a microwave reactor quickly, control the power of the reactor to 500W, and the reaction time is 20min, then cool, filter, wash twice with deionized water, dry in vacuum at 105°C for 2 hours, observe by SEM, and obtain magnesium hydroxide The particle diameter of the particles was 1 μm.

Embodiment 3

[0013] First prepare an aqueous solution of magnesium sulfate with a concentration of 35g / L, take 200mL in a polytetrafluoroethylene cup, add the same volume of 40g / L aqueous sodium hydroxide solution, and 10mL of 1g / L sulfonated glutarate, stir quickly Place in a microwave reactor, control the power of the reactor to be 700W, and the reaction time is 40min, then cool, filter, wash twice with deionized water, dry in vacuum at 105°C for 2 hours, and observe by SEM to obtain the magnesium hydroxide particles. The particle size is 0.2 μm.

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PUM

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Abstract

The invention relates to a method for synthesizing a magnesium hydroxide flame retardant, in particular to a method for synthesizing an ultrafine magnesium hydroxide flame retardant by a precipitation method. It is characterized in that in the aqueous solution containing magnesium sulfate, sodium hydroxide and modifier sulfonated glutarate, the concentration of magnesium sulfate is 4-18g / l, and the concentration of sodium hydroxide is 5-20g / l l, the amount of modifier sulfonated glutarate is 0.01-0.03g / l. The method for synthesizing a magnesium hydroxide flame retardant of the present invention uses magnesium salt and an inorganic base to prepare magnesium hydroxide through microwave precipitation. It is characterized in that the precipitated particles are thinned by using microwave, and magnesium hydroxide particles with different particle sizes can be obtained by controlling different microwave power and time. Anionic surfactants make flame retardants more effective.

Description

technical field [0001] The invention relates to a method for synthesizing a magnesium hydroxide flame retardant, in particular to a method for synthesizing an ultrafine magnesium hydroxide flame retardant by a precipitation method. Background technique [0002] Magnesium hydroxide is a widely used flame retardant, mainly used in construction, transportation, transportation, electronic appliances, chemical industry and other fields. The relevant patents CN01134059.2, CN200410067540.8, 03134189.6 and 02133360.2 were consulted. The conventional precipitation method and natural brucite were mainly used. The particle size of the produced magnesium hydroxide was relatively coarse, and the particle size was not easy to control. Contents of the invention [0003] The object of the invention is to aim at the deficiencies in the above-mentioned prior art, and provide a kind of magnesium hydroxide particle size that produces is fine, the synthetic method of the magnesium hydroxide fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/22C09K21/02
Inventor 仓向辉张树朝楮丙武
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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