Preparation method of magnesium hydroxide material
A technology of magnesium hydroxide and raw materials, applied in magnesium hydroxide and other directions, to achieve the effects of reducing viscosity, improving production efficiency and increasing concentration
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[0036] The embodiment of the present invention provides a kind of preparation method of magnesium hydroxide material, and described preparation method comprises:
[0037] Step S10, preparing a mixed slurry containing magnesium hydroxide raw material and a viscosity regulator.
[0038] In step S20, the mixed slurry is subjected to hydrothermal reaction treatment, and after the reaction is completed, the magnesium hydroxide product is prepared through filtration treatment, washing treatment and drying treatment.
[0039] Wherein, in step S10, the viscosity modifier is selected from one or more of sodium chloride, potassium chloride, sodium sulfate, magnesium sulfate and potassium sulfate.
[0040] The applicant of the present invention has found through exploration that adding a viscosity modifier before carrying out the hydrothermal modification treatment, the viscosity modifier is selected from one of sodium chloride, potassium chloride, sodium sulfate, magnesium sulfate and p...
Embodiment 1
[0057] Preparation concentration is the sodium chloride solution of 1.0mol / L, namely, take neutral substance sodium chloride as viscosity modifier; No. 1 magnesium hydroxide powder of 340g is joined in the reactor, and the described chlorine of 1660g is weighed The sodium chloride solution was poured into the reactor and stirred and mixed to obtain a mixed slurry A. Wherein, the mass concentration of magnesium hydroxide in the mixed slurry A is 17%.
[0058] The mixed slurry A in the reactor was transferred to a high-pressure reactor, and the hydrothermal reaction was carried out under the conditions of a temperature of 160°C and a stirring intensity of 300r / min, and the hydrothermal reaction time was 3h. After the hydrothermal reaction is completed, the viscosity of the mixed slurry is tested, and the viscosity is 428mPa·s.
[0059] After the hydrothermal reaction is completed, the magnesium hydroxide slurry is sequentially filtered, washed, dried and sieved to obtain the ma...
Embodiment 2
[0071] The preparation concentration is the sodium chloride solution of 2.0mol / L, namely, take neutral substance sodium chloride as viscosity regulator; No. 1 magnesium hydroxide powder body of 340g is joined in the reactor, weighs 1654.9g described The sodium chloride solution was poured into the reactor and stirred and mixed, and then 5.1 g of ammonium polyacrylate was added as a dispersant, and the stirring and mixing was continued to obtain a mixed slurry C. Wherein, the mass concentration of magnesium hydroxide in the mixed slurry C is 17%, and the addition amount of ammonium polyacrylate as a dispersant is 1.5% of the mass of the magnesium hydroxide powder.
[0072] The mixed slurry C in the reactor was transferred to a high-pressure reactor, and a hydrothermal reaction was carried out under the conditions of a temperature of 160° C. and a stirring intensity of 500 r / min. The time of the hydrothermal reaction was 3 hours. The viscosity of the mixed slurry after the compl...
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