Method for preparing high dispersed magnesium hydroxide from agglomerated state magnesium hydroxide

Abstract

The invention relates to a method for preparing high dispersed magnesium hydroxide from agglomerated state magnesium hydroxide, and belongs to the technical field of the preparation of inorganic chemical industry materials. According to the method disclosed by the invention, the high dispersed magnesium hydroxide is prepared through the following steps: using agglomerated state magnesium hydroxide as a raw material, wherein the original average particle diameter is 0.1-3 microns, and the average agglomerated particle diameter is 5-50 microns, firstly, mixing the raw material with proper amount of inorganic solvent, and roasting the mixture for 0.5-6 hours at the temperature of 300-700 DEG C, so as to form dispersed superfine active magnesium oxide; then, adding the magnesia to an aqueous solution containing a dispersing agent and a morphological control agent, and performing hydration conversion for 0.5-6 hours at the temperature of 10-100 DEG C so as to obtain the high dispersed magnesium hydroxide of which the original average particle diameter is 0.1-3 microns, the average agglomerated particle diameter is 0.5-4.0 microns, the morphology is regular, and the particle diameters are homogeneous. The method disclosed by the invention is simple in technology, is mild in process, and is high in added value of a product. The magnesium hydroxide prepared by the method disclosed by the invention is regular in morphology and is good in dispersion, can be used as a basic inorganic chemical industry product to be used in the fields of flame resistance, foods, desulphurization, wastewater treatment and the like.

Description

technical field

[0001] The invention relates to a preparation method of highly crystalline and highly dispersed magnesium hydroxide, which belongs to the technical field of preparation of inorganic chemical materials. Background technique

[0002] my country is a country with abundant magnesium resources in salt lakes, but limited by technical and economic conditions, magnesium resources in salt lakes are still in the primary development stage, mainly primary products such as magnesium chloride, magnesium sulfate, magnesium oxide, and ordinary magnesium hydroxide, and the development of high value-added magnesium salt products is still in progress. In its infancy.

[0003] Highly dispersed magnesium hydroxide, as a basic inorganic chemical product, has been widely used in flame retardant, food, desulfurization and wastewater treatment, and its research and development is becoming a hot spot at home and abroad. There are many methods for preparing magnesium hydroxide, such as...

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