Preparation method for catalyst for condensation of biological based lactic acid to generate 2,3-pentanedione and application of catalyst
A pentanedione catalyst and bio-based technology, which is used in the preparation of organic compounds, condensation preparation of carbonyl compounds, physical/chemical process catalysts, etc., can solve the problems of low selectivity and poor catalyst selectivity, and achieve high catalytic activity. The effect of catalytic activity and good catalytic stability
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Embodiment 1
[0029] First, weigh 14.6g of aluminum nitrate nonahydrate and 3.3g of cesium nitrate, and fully dissolve them in 100ml of deionized water. Use 25-28% ammonia water as a precipitating agent, adjust the pH value to about 9-10, continue stirring at room temperature for 1 hour, and continue stirring at 70°C until it becomes a slurry, at 100°C. Under an air atmosphere, the temperature was programmed to rise to 600 ° C for 10 h. The obtained alumina is loaded with cesium aluminum nitrate catalyst for tableting and granulation, and 20-40 meshes are taken as the catalyst for future use. Select a quartz tube with a length of 400mm and an inner diameter of 3mm, and fill 0.44g of the above spare catalyst in the quartz tube. The length of the catalyst in the tube is 30mm. Both ends of the catalyst are sealed with quartz wool, and the length of the quartz wool is 30mm. . The lactic acid aqueous solution was carried by nitrogen gas through the above-mentioned quartz tube equipped with the...
Embodiment 2
[0031] First, weigh 14.6g of aluminum nitrate nonahydrate and 3.3g of cesium nitrate, and fully dissolve them in 100ml of deionized water. Use ammonia water with a mass fraction of 25-28% as a precipitating agent, adjust the pH value to about 9-10, continue stirring at room temperature for 1 hour, and continue stirring at 70°C until it becomes a slurry. Under an air atmosphere, the temperature was programmed to rise to 600° C. and calcined for 10 hours. The obtained alumina was loaded with cesium aluminum nitrate catalyst for tableting and granulation, and 20-40 mesh was used as the catalyst for later use. Select a quartz tube with a length of 400mm and an inner diameter of 3mm, and fill 0.44g of the above spare catalyst in the quartz tube. The length of the catalyst in the tube is 30mm. Both ends of the catalyst are sealed with quartz wool, and the length of the quartz wool is 30mm. . The lactic acid aqueous solution was carried by nitrogen gas through the above-mentioned qu...
Embodiment 3
[0033] First, weigh 14.6g of aluminum nitrate nonahydrate and 3.3g of cesium nitrate, and fully dissolve them in 100ml of deionized water. Use ammonia water as a precipitating agent, adjust the pH value to about 9-10, continue stirring at room temperature for 1 hour, and continue stirring and heating at 70°C until it becomes a slurry. Under an air atmosphere, the temperature was programmed to rise to 600° C. and calcined for 10 hours. The obtained alumina was loaded with cesium aluminum nitrate catalyst for tableting and granulation, and 20-40 mesh was taken as the catalyst for later use.
[0034] Select a quartz tube with a length of 400 mm and an inner diameter of 3 mm, fill 0.42 g of the above-mentioned spare catalyst in the quartz tube, the length of the catalyst in the tube is 30 mm, and the two ends of the catalyst are sealed with quartz wool, and the length of the quartz wool is 30 mm . The lactic acid aqueous solution was carried by nitrogen gas through the above-ment...
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