Method for preparing carrier of cyclohexanone catalyst through cyclohexanol dehydrogenation and application
A technology of catalyst carrier and cyclohexanone, which is applied in the direction of catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of low selectivity and low activity, and achieve cyclohexanone The effect of high selectivity, high conversion rate and reasonable pore structure
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Embodiment 1
[0018] In a precipitation tank with stirring, co-precipitate 1M sodium carbonate solution and JA-25 silica sol, at a temperature of 50°C, the pH value of the end point of the precipitation is 10, age at a temperature of 60°C for 30min, and wash , drying, granulation, and tablet molding to obtain a semi-finished carrier. The carrier was roasted at 650°C for 4 hours, and then the carrier was treated in water at 160°C for 1 hour, and then a strong acid was added therein, and the acid concentration was adjusted to 0.5% by weight. %, soaked at 70°C for 2.0 hours, washed, separated, and dried to obtain carrier A. The specific surface area of the carrier is 228.3m 2 / g, the pore volume is 0.35ml / g, and the average pore diameter is 4.7nm.
Embodiment 2
[0020] In a precipitation tank with stirring, co-precipitate 1M sodium carbonate solution and JA-30 type silica sol, at a temperature of 70°C, the pH value of the end point of the precipitation is 9.0, age at a temperature of 70°C for 20min, and wash , drying, granulation, and tablet molding to obtain a semi-finished carrier. The carrier was roasted at 680°C for 5 hours, and then the carrier was treated in water at 180°C for 2 hours, and then a strong acid was added therein to adjust the acid concentration to 1.2% by weight. %, soaked at 80°C for 2 hours, washed, separated, and dried to obtain carrier B. The specific surface area of the carrier is 356..7m 2 / g, the pore volume is 0.42ml / g, and the average pore diameter is 4.6nm.
Embodiment 3
[0022] In a precipitation tank with stirring, co-precipitate 1M nitric acid solution and JN-25 silica sol. At a temperature of 60°C, the pH value of the end point of the precipitation is 6.0, and age at a temperature of 90°C for 10 minutes. After washing, Drying, granulation, and tablet molding to obtain a semi-finished carrier, roast the carrier at 750°C for 3 hours, then treat the carrier in water at 200°C for 4 hours, then add strong acid to it, and adjust the acid concentration to 2% by weight , soaked at 80°C for 2 hours, washed, separated, and dried to obtain carrier C. The specific surface area of the carrier is 456.1m 2 / g, the pore volume is 0.85ml / g, and the average pore diameter is 5.2nm.
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