Preparation method of fibrous alkali magnesium sulfate whisker
A magnesium sulfate whisker and magnesium sulfate technology, applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve the problems of difficulty in inhibiting the growth of fan-shaped whiskers, long hydrothermal reaction time, and low single-shot yield. Achieve the effect of realizing large-scale industrial production, easy large-scale industrial production, and reducing the cost of raw materials
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Embodiment 1
[0029] Prepare 1.0mol / L MgSO 4 ·7H 2 O solution 1.6 liters, add 98.5 grams of granular NaOH (MgSO 4 The molar ratio to NaOH is 0.65:1), aged at 25°C for 2 hours. Transfer the obtained slurry into a 2-liter reactor with a filling degree of 80%, add 0.55 g of seed crystals (particle size 0.2-2.0 μm), and stir evenly. The slurry was reacted at 130°C for 2 hours. After the reaction was completed, it was naturally cooled to room temperature. Filtrate, wash and dry the white suspension obtained after the hydrothermal reaction to obtain 152-type fibrous basic sulfuric acid with a length of 30-50 μm, a diameter of 0.2-0.5 μm, an aspect ratio of 60-200, and a main content of 98.0%. Magnesium whiskers.
Embodiment 2
[0031] Prepare 1.0mol / L MgSO 4 ·7H 2 O solution 1.6 liters, add 60.0 grams of granular NaOH (MgSO 4 The molar ratio to NaOH is 1:1), aged at 60°C for 24 hours. Move the obtained slurry into a 2-liter reactor with a filling degree of 75%, add 3.5 grams of seed crystals (0.2-2.0 μm in particle size), and stir evenly. The slurry was reacted at 180°C for 12 hours. After the reaction was completed, it was naturally cooled to room temperature. Filtrate, wash and dry the white suspension obtained after the hydrothermal reaction to obtain 152-type fibrous basic sulfuric acid with a length of 50-200 μm, a diameter of 0.5-1.0 μm, an aspect ratio of 50-400, and a main content of 98.7%. Magnesium whiskers.
Embodiment 3
[0033] Prepare 1.5mol / L MgSO 4 ·7H 2 O solution 1.0 L, add 92.3 g granular NaOH (MgSO 4 The molar ratio to NaOH is 0.65:1), aged at 100°C for 24 hours. Move the obtained slurry into a 2-liter reactor with a filling degree of 50%, add 4.0 grams of seed crystals (0.2-2.0 μm in particle size), and stir evenly. The slurry was reacted at 130°C for 12 hours. After the reaction was completed, it was naturally cooled to room temperature. Filtrate, wash and dry the white suspension obtained after the hydrothermal reaction to obtain 152-type fibrous basic sulfuric acid with a length of 50-200 μm, a diameter of 0.2-0.5 μm, an aspect ratio of 100-1000, and a main content of 98.9%. Magnesium whiskers.
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