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.