Palladium-cobalt alloy catalyst and preparation method and application thereof
A kind of alloy catalyst and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of poor hydrogenation selectivity and low hydrogenation efficiency of catalysts, and achieve The effect of reducing the amount of precious metals and overall cost, improving utilization efficiency and good stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment approach
[0120] 1. A palladium-cobalt alloy catalyst for preparing hydrogen peroxide by anthraquinone hydrogenation, with mesoporous silica as a carrier, the composition of the catalyst uses Pd x co 1-x / SiO 2 It means that the catalyst is prepared by impregnation method, washed, dried and reduced, and the hydrogenation activity test of 2-ethylanthraquinone is carried out under the condition of reaction temperature 30-60°C and the active components are loaded with metal palladium and cobalt. The content of palladium is 0.1-0.5wt%, and the content of cobalt is 0.1-2wt%.
[0121]2. The carrier is shaped mesoporous silica, the shape of the carrier is spherical, and the pore diameter of the catalyst particles is 2-50 nm.
[0122] 3. The specific surface area of the carrier is 100-350m 2 / g, the pore volume is 0.5-1.5ml / g, and the bulk density is 0.6-1.0g / ml.
[0123] 4. Using hydrogen reduction method.
[0124] 5. First, the acidic palladium and cobalt solution is configured as the ...
Embodiment 1
[0128] (1-1) Weigh SiO with an average particle size of 2 μm 2 Powder 21g, concentrated hydrochloric acid 15ml, SiO 2 The mass fraction of 30%wt alkaline silica sol 126g (where SiO 2 The average particle size is 25nm) and 10ml of methanol are fully mixed, and then 15g of hexamethylenetetramine is added to fully dissolve to obtain a mixed slurry;
[0129] (1-2) Select a nozzle with an aperture of 0.25mm and install it on the jet generator, inject the mixed slurry obtained in step (1-1) into 25# transformer oil at 95°C at a speed of 5m / s, and let it stand After aging for 4 hours, the formed pellets were separated from the oil and dried under vacuum at 80°C for 12 hours. The obtained product was washed to neutrality, then dried at 140°C for 10 hours, and calcined at 550°C for 12 hours to obtain micron-shaped spherical silica particles, namely the carrier;
[0130] (1-3) Weigh 1.6800g PdCl 2 (Palladium content is 59.5%) be dissolved in 10ml deionized water and be made into sol...
Embodiment 2
[0137] (2-1) Weigh SiO with an average particle size of 2 μm 2 Powder 21g, concentrated nitric acid 5ml, SiO 2 The mass fraction of 30%wt alkaline silica sol 126g (where SiO 2 The average particle size is 25nm) and 10ml of ethanol are fully mixed, then add 2g (300 mesh) wollastonite and 15g hexamethylenetetramine, fully dissolve, to obtain a mixed slurry;
[0138] (2-2) Select a nozzle with an aperture of 0.25mm and install it on the jet generator, inject the mixed slurry obtained in (2-1) into 25# transformer oil at 90°C at a speed of 5m / s, and let it stand for aging After 4 hours, the formed pellets were separated from the oil and dried under vacuum at 60°C for 24 hours. The obtained product was washed to neutrality, then dried at 140°C for 10 hours, and calcined at 550°C for 12 hours to obtain micron-shaped spherical silica particles, namely the carrier;
[0139] (2-3) Weigh 2.1657g Pd(NO 3 ) 2 (Palladium content is 46.2%) be dissolved in 10ml deionized water and it is...
PUM
| Property | Measurement | Unit |
|---|---|---|
| specific surface area | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More