Molybdenum-vanadium composite oxide catalyst as well as preparation method and application thereof
A technology of composite oxides and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problem of affecting catalyst stability and excessive distribution of effective active phases , uneven distribution of active phase, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0061] 2. Preparation method of composite metal oxide catalyst
[0062] The inventors of the present invention have found that if the Mo-V series composite metal oxide catalyst is prepared by the inner core impregnation method, the catalyst activity of the prepared catalyst is significantly better than that of the catalyst prepared by other methods (such as the direct mixing method). After running for 8000 hours, its selectivity and stability are obviously higher than those of the catalyst prepared by solid dry mixing method. The present invention has been accomplished on the basis of this discovery. Therefore, the manufacture method of catalyst of the present invention comprises:
[0063] (i) Preparation of catalyst "core" from precursor compounds
[0064] In the present invention, the term "precursor compound" refers to a water-soluble compound or oxide containing elements required for the catalyst.
[0065] The term "core" means having the following [Mo a V b W c Cu ...
Embodiment 1
[0099] (i) Preparation of catalyst
[0100] "Kernel" Mo 3.0 V 0.3 W 1.3 Sb 2.5 Cu 0.94 Preparation of (unmarked oxygen element)
[0101] (1) Preparation of solution A: Take 75mL of distilled water and add it to a 500mL beaker, heat to 60°C, and then add 0.54g of ammonium metavanadate during heating to 100°C, stir at 100°C for 30min, add 8.16g of paramolybdic acid Ammonium, stirred at constant temperature for 10 minutes, then added 5.05g of ammonium metatungstate, stirred at constant temperature for 10 minutes, finally added 5.61g of antimony trioxide, continued to stir at 100°C for 3h, and then cooled to 60°C.
[0102] (2) Preparation of solution B: Add 15 mL of distilled water into a 100 mL beaker, heat to 60°C, then add 3.49 g of copper nitrate, stir to dissolve.
[0103] (3) Mixing process: Add the prepared B solution into the above A solution, and continue to stir at 60°C for 10 minutes. Then take 49g of Si powder and add it into the above mixture, and continu...
Embodiment 2
[0112] (i) Preparation of catalyst
[0113] "Kernel" Mo 1.6 V 0.7 Sb 2.5 Cu 0.94 Preparation of (unmarked oxygen element)
[0114] (1) Preparation of solution A: Take 200mL of distilled water and add it to a 500mL beaker, heat it to 60°C, and then add 2.52g of ammonium metavanadate during the process of raising the temperature to 100°C, stir at 100°C for 30min, then add 8.7g of paramolybdenum ammonium chloride, stirred at constant temperature for 10 minutes, and finally added 11.22 g of antimony trioxide, continued to stir at 100°C for 3 hours, and then lowered the temperature to 60°C.
[0115] (2) Preparation of solution B: Add 15mL of distilled water into a 100mL beaker, heat to 60°C, then add 6.98g of copper nitrate, stir to dissolve.
[0116] (3) Mixing process: Add the prepared B solution into the above A solution, and continue to stir at 60°C for 10 minutes. Then take 98g of Si powder and add it into the above mixture, and continue stirring at constant tempera...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Particle size | aaaaa | aaaaa |
| Graininess | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More