A kind of alumina grain and preparation method thereof
A technology of alumina and crystal grains, which is applied in the field of alumina grains and its preparation, and can solve problems such as difficulty in meeting the application requirements in the field of catalysis
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0035] Pseudo-boehmite powder is roasted at 500°C for 6 hours, then uniformly mixed with 2% of its mass of sodium chloride, ground into fine powder with a ball mill, sieved to a powder of about 5000 mesh, washed with distilled water to remove sodium chloride, and then Be made into 25g / L suspension, the solvent of this suspension is the mixture of water and ethanol, the mass ratio of both is 4. Add part of acetic acid to the suspension, so that the amount of acetic acid is 1.5% of the mass of the alumina precursor. Using a high-speed shear stirrer (20000 rpm), shear and stir at room temperature for 15 minutes. Add ethanolamine and tetraethylammonium hydroxide to the system, and the final concentrations of the two are 25g / L and 25g / L respectively. After stirring evenly, seal the system and raise the temperature to 180°C for hydrothermal treatment for 6 hours. The product dried at 120° C. was dried at 200° C. and calcined at 550° C. for 6 hours. The XRD spectra of the products ...
Embodiment 2
[0037] Pseudo-boehmite powder is roasted at 650°C for 3 hours, then uniformly mixed with sodium sulfate accounting for 5% of its mass, ground into a fine powder with a ball mill, sieved the powder of about 10,000 mesh, washed with distilled water to remove sodium sulfate, and then formulated An aqueous suspension with a mass concentration of 20 g / L, the solvent of which is a mixture of water and methanol, and the mass ratio of the two is 1. Add formic acid to the suspension so that the amount of formic acid is 2.5% of the mass of the alumina precursor. Use a high-speed shear mixer (10,000 rpm) for 25 minutes at room temperature. Add triethanolamine and tetramethylammonium hydroxide to the system, and the final concentrations of the two are 20g / L and 35g / L respectively. After stirring evenly, the system is sealed and heated to 200°C for hydrothermal treatment for 6 hours. The product dried at 120° C. was dried at 200° C. and calcined at 550° C. for 6 hours. The XRD spectra of...
Embodiment 3
[0039] Pseudoboehmite powder is calcined at 600°C for 4 hours, then uniformly mixed with sodium sulfate accounting for 3% of its mass, ground into a fine powder with a ball mill, sieved the powder of about 10,000 mesh, washed with distilled water to remove sodium sulfate, and then formulated An aqueous suspension with a mass concentration of 35g / L, the solvent of which is a mixture of water and methanol, and the mass ratio of the two is 2. Add part of acetic acid to the suspension, so that the amount of acetic acid is 1.5% of the mass of the alumina precursor. Use a high-speed shear mixer (10,000 rpm) for 20 minutes at room temperature. Add phenethylamine and tetrapropylammonium hydroxide to the system, the final concentrations of the two are 35g / L and 20g / L respectively, after stirring evenly, seal the system and raise the temperature to 150°C for hydrothermal treatment for 6 hours. The product dried at 120° C. was dried at 200° C. and calcined at 550° C. for 6 hours. The X...
PUM
| Property | Measurement | Unit |
|---|---|---|
| size | aaaaa | aaaaa |
| size | aaaaa | aaaaa |
| size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More