Preparation method of boehmite nanopowder
A nano-powder and boehmite technology, applied in the field of nano-materials, to achieve the effects of inhibiting particle size growth, shortening time, and reducing production costs
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Embodiment 1
[0022] Add 1Kg industrial alumina powder (D 50 =10μm), stir, mix evenly, pour the mixed solution into the reaction kettle, set the stirring speed in the reaction kettle to 500rpm, adjust the pressure in the kettle to 3.5MPa, keep the pressure for 1.0h, do not go through the process of depressurization in the kettle The slurry obtained after the reaction was released directly under the condition of a pressure of 3.5MPa, the slurry was cooled to room temperature, then suction filtered, and washed repeatedly with distilled water until the filtrate pH=7, and the product obtained after suction filtration was dried at 110°C for 12 hours , the nano-boehmite powder can be obtained, and the particle size of the product is observed with a scanning electron microscope (SEM). The particle size of the boehmite powder prepared in this example is 50-100 nm.
Embodiment 2
[0024] Add 1Kg industrial alumina powder (D 50 =10μm), stir, mix evenly, pour the mixed solution into the reaction kettle, set the stirring speed in the reaction kettle to 500rpm, adjust the pressure in the kettle to 4.0MPa, keep the pressure for 1h, and keep the pressure in the kettle without going through the process of depressurization Under the condition of 4.0MPa, the slurry obtained after the reaction was released directly, the slurry was cooled to room temperature, then suction filtered, and washed repeatedly with distilled water until the pH of the filtrate = 7, and the product obtained after suction filtration was dried at 110°C for 12 hours. The nano-boehmite powder can be obtained, and the particle size of the product is observed with a scanning electron microscope (SEM). The particle size of the boehmite powder prepared in this example is 30-100 nm.
Embodiment 3
[0026] Add 1Kg industrial alumina powder (D 50 =10μm), stir, mix evenly, pour the mixed solution into the reaction kettle, set the stirring speed in the reaction kettle to 500rpm, adjust the pressure in the kettle to 5.0MPa, keep the pressure for 1h, and keep the pressure in the kettle without going through the process of depressurization Under the condition of 5.0MPa, the slurry obtained after the reaction was released directly, the slurry was cooled to room temperature, then suction filtered, and washed repeatedly with distilled water until the filtrate pH=7, and the product obtained after suction filtration was dried at 110°C for 12 hours. The nano-boehmite powder can be obtained, and the particle size of the product is observed with a scanning electron microscope (SEM). The particle size of the boehmite powder prepared in this example is 50-100 nm.
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