Catalyst for oxidative dehydrogenation of butene to butadiene
An oxidative dehydrogenation and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc. Problems such as low catalyst activity
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Embodiment 1
[0016] Dissolve 230.8 grams of magnesium nitrate, 178.5 grams of zinc nitrate and 1532.3 grams of ferric nitrate in 3L of distilled water, add dropwise 15% ammonia solution under rapid stirring, the pH of the precipitation end point is 9.0, stir at 50°C for 30 minutes, and let stand at room temperature For 2 hours, the resulting slurry was filtered and washed to a nitrate ion concentration of less than 1000 ppm. Add 35.8 grams of phosphoric acid, 200 grams of 10% PVA, and deionized water to the above-mentioned active component slurry to make a slurry, control the solid content to 30%, stir for about 10 minutes, and ball mill at room temperature for 2 hours to obtain the slurry. Carry out microsphere molding in a desiccator, and finally dry at 90°C for 12 hours, then transfer to a muffle furnace for calcination for 6 hours at a furnace temperature of 750°C to obtain a catalyst sample.
Embodiment 2
[0018] Dissolve 243.6 grams of magnesium nitrate, 238.0 grams of zinc nitrate and 1725.3 grams of ferric nitrate in 3L of distilled water, add dropwise 15% ammonia solution under rapid stirring, the precipitation end point pH=8.0, stir at 50°C for 30 minutes, and let stand at room temperature For 2 hours, the resulting slurry was filtered and washed to a nitrate ion concentration of less than 1000 ppm. Add 54.6 grams of phosphoric acid, 600 grams of 2% glycerin solution, and deionized water to the above-mentioned active component slurry to make a slurry, control the solid content to 30%, stir for about 10 minutes, and ball mill at room temperature for 2 hours to obtain the slurry. The microspheres were formed in a spray dryer, and finally dried at 90°C for 12 hours and then transferred to a muffle furnace for 6 hours of roasting at a furnace temperature of 650°C to obtain a catalyst sample.
Embodiment 3
[0020] Dissolve 200.6 grams of magnesium nitrate, 119.00 grams of zinc nitrate and 1345.3 grams of ferric nitrate in 3L of distilled water, add dropwise 15% ammonia solution under rapid stirring, the pH of the precipitation end point is 9.0, stir at 50°C for 30 minutes, and let stand at room temperature For 2 hours, the resulting slurry was filtered and washed to a nitrate ion concentration of less than 1000 ppm. Add 39.2 grams of phosphoric acid, 600 grams of 2% glycerin solution, and deionized water to the above-mentioned active component slurry to make a slurry, control the solid content to 30%, stir for about 10 minutes, and ball mill at room temperature for 2 hours to obtain the slurry. Microspheres were formed in a spray dryer, and finally dried at 90°C for 12 hours and then transferred to a muffle furnace for calcination for 10 hours at a furnace temperature of 650°C to obtain a catalyst sample.
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