A kind of method for preparing cyclohexylamine
A technology of cyclohexylamine and aniline, which is applied in the field of preparation of organic compounds, can solve the problems of unexplained aniline conversion rate, low reaction pressure, and low degree of automation, and achieve continuous process safety, mild reaction conditions, and high degree of automation Effect
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Embodiment 1
[0056] Preparation of 1# co-precipitated Co-based catalyst:
[0057] Dissolve 310.74g cobalt nitrate hexahydrate, 37.73g copper nitrate, 2.93g silver nitrate, 135.08g barium nitrate in 2000ml deionized water, heat to 90°C to form a homogeneous solution, and slowly add 25wt% sodium carbonate aqueous solution to the solution, In the reaction process, the pH value is controlled between 9-10. After the reaction, the temperature is kept for 4 hours at 60° C. to obtain a suspension of the corresponding mixture. Then, vacuum filtration is carried out for separation, and the solid phase is washed with deionized water to the sodium content. <0.2wt%, after natural drying, it was dried at 120°C for 24h, then calcined at 700°C for 6h, and finally pressed into a tablet to obtain a catalyst with an oxidized state of 3*3mm, in which the content of cobalt oxide was 40wt%. The content of copper is 8 wt %, the content of silver oxide is 1 wt %, and the rest is carrier barium carbonate.
Embodiment 2
[0059] Preparation of 2# co-precipitated Co-based catalyst:
[0060] Dissolve 271.90g cobalt nitrate hexahydrate, 28.30g copper nitrate, 5.86g silver nitrate, and 150.98g barium nitrate in 2000ml deionized water, heat to 85°C to form a homogeneous solution, and slowly add 25wt% sodium carbonate aqueous solution to the solution, In the reaction process, the pH value is controlled between 9-10. After the reaction is completed, heat preservation and aging at 70 ° C for 2 hours to obtain the suspension of the corresponding mixture, then vacuum filtration and separation, and the solid phase is washed with deionized water to the sodium content. <0.2wt%, after natural drying, it was dried at 110°C for 36h, then calcined at 750°C for 6h, and finally pressed into a tablet to obtain a catalyst in an oxidized state of 3*3mm, in which the content of cobalt oxide was 35wt%. The content of copper is 6 wt %, the content of silver oxide is 2 wt %, and the rest is carrier barium carbonate.
Embodiment 3
[0062] 3# Co-precipitated Co-based catalyst preparation:
[0063] Dissolve 116.53g cobalt nitrate hexahydrate, 47.16g copper nitrate, 1.47g silver nitrate, and 197.33g barium nitrate in 2000ml deionized water, heat to 80°C to form a homogeneous solution, and slowly add 25wt% sodium carbonate aqueous solution to the solution, In the reaction process, the pH value is controlled between 9-10. After the reaction is completed, the suspension is kept at 65° C. for 2 hours to obtain a suspension of the corresponding mixture. Then, vacuum filtration is carried out for separation, and the solid phase is washed with deionized water to the sodium content. <0.2wt%, after natural drying, it was dried at 100°C for 48h, then calcined at 650°C for 8h, and finally pressed into a tablet to obtain a catalyst with an oxidized state of 3*3mm, in which the content of cobalt oxide was 15wt%. The content of copper is 10 wt %, the content of silver oxide is 0.5 wt %, and the rest is carrier barium car...
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