Catalyst for preparing butadiene through oxidative dehydrogenation of butene
A technology of oxidative dehydrogenation and butadiene, applied in the direction of physical/chemical process catalysts, organic chemistry, hydrocarbons, etc., can solve the problems of high water-ene ratio, low catalyst activity, high energy consumption, etc., and achieve good butene Effect of oxidative dehydrogenation catalytic activity, good technical effect
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Embodiment 1
[0016] Dissolve 181.3 grams of zinc nitrate, 153.4 grams of chromium nitrate and 1425.9 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 63.4 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. The microspheres were formed in a dryer, and finally dried at 90°C for 12 hours, then transferred to a muffle furnace for calcination at a temperature of 750°C for 6 hours to obtain a catalyst sample.
Embodiment 2
[0018] Dissolve 367.9 grams of zinc nitrate, 216.7 grams of chromium nitrate and 1241.0 grams of ferric nitrate in 3L of distilled water, add dropwise 15% ammonia solution under rapid stirring, the precipitation end point pH=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 78.6 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 284.9 grams of zinc nitrate, 198.4 grams of chromium nitrate and 1245.6 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 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 32.8 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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