Hydrotalcite and its production method
A manufacturing method and technology of hydrotalcite, applied in the direction of hydrotalcite, chemical instruments and methods, aluminum compounds, etc., can solve problems such as insufficient quality of synthetic products, and achieve the effect of improving transparency
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Embodiment 1
[0131] (Example 1) Production of Hydrotalcite
[0132] In a 5 L container, 447.3 g of magnesium hydroxide (D50=4.0 μm) and 299.2 g of aluminum hydroxide (D50=8.0 μm) were added, water was added to make the total amount 3 L, and a slurry was prepared by stirring for 10 minutes. D50 of this slurry was 10 micrometers, and D90 was 75 micrometers. This slurry was supplied to a wet pulverization device equipped with a cooling unit (DynoMill MULTILAB, manufactured by SHINMARU ENTERPRISES CORPORATION, filled with zirconia beads), and the temperature of the slurry was controlled not to exceed 40°C during pulverization, and wet pulverization treatment was performed for 18 minutes (residence time). As a result, D50 of the slurry was 1.0 μm, D90 was 3.5 μm, and the viscosity of the slurry was 5000 mPa·s. Thereafter, sodium bicarbonate was added to 2 L of the pulverized slurry so as to make it 1 / 2 mole relative to 1 mole of magnesium hydroxide, and the whole was adjusted to 8 L with water...
Embodiment 2
[0133] (Example 2) Manufacture of Hydrotalcite
[0134]In a 5 L container, 447.3 g of magnesium hydroxide (D50=4.0 μm) and 299.2 g of aluminum hydroxide (D50=8.0 μm) were added, water was added to make the total amount 3 L, and a slurry was prepared by stirring for 10 minutes. D50 of this slurry was 10 micrometers, and D90 was 75 micrometers. This slurry was supplied to a wet pulverization device equipped with a cooling unit (DynoMill MULTILAB, manufactured by SHINMARU ENTERPRISES CORPORATION, filled with zirconia beads), and the temperature of the slurry was controlled not to exceed 50°C during pulverization, and wet pulverization treatment was performed for 18 minutes (residence time). As a result, D50 of the slurry was 1.0 μm, D90 was 3.5 μm, and the viscosity of the slurry was 4800 mPa·s. Thereafter, sodium bicarbonate was added to 2 L of the pulverized slurry so as to make it 1 / 2 mole relative to 1 mole of magnesium hydroxide, and the whole was adjusted to 8 L with water...
Embodiment 3
[0142] (Example 3) Production of Hydrotalcite
[0143] In a 5 L container, 447.3 g of magnesium hydroxide (D50=4.0 μm) and 299.2 g of aluminum hydroxide (D50=8.0 μm) were added, water was added to make the total amount 3 L, and a slurry was prepared by stirring for 10 minutes. D50 of this slurry was 10 micrometers, and D90 was 75 micrometers. This slurry was supplied to a wet pulverization device equipped with a cooling unit (DynoMill MULTILAB, manufactured by SHINMARU ENTERPRISES CORPORATION, filled with zirconia beads), and the temperature of the slurry was controlled not to exceed 40°C during pulverization, and wet pulverization treatment was performed for 18 minutes (residence time). As a result, D50 of the slurry was 1.0 μm, D90 was 3.5 μm, and the viscosity of the slurry was 5000 mPa·s. Thereafter, sodium carbonate was added to 2 L of the pulverized slurry so as to make it 1 / 2 mole relative to 1 mole of magnesium hydroxide, and the whole was adjusted to 8 L with water, ...
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