Method for preparing C2 oxygen-containing compound through CO hydrogenation
A compound and catalyst technology, which is applied in the pretreatment field of Rh catalyst carrier silica gel, can solve problems such as the impact of treatment effects, achieve a simple and reliable method, and reduce the cost of catalysts
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Embodiment 1
[0017] Weigh 10g of silica gel (product of Qingdao Haiyang Co., Ltd.) into a pressure vessel filled with 50ml of anhydrous ethanol, seal it and place it in a muffle furnace, raise it from room temperature to 150°C and keep it for 1h. After receiving, the liquid was poured out, and the obtained solid was dried at room temperature and then dried overnight at 110°C. Then bake at 350°C for 2h. Take by weighing gained sample 2.0g, join in containing certain amount RhCl3, MnCl 2 , LiCl ethanol solution, dried at 110°C for 4h, and calcined at 350°C for 4h, the obtained catalyst is marked as A. Catalyst composition Rh 1.5wt%; Mn0.5wt%; Li 0.05wt%.
[0018] The CO hydrogenation reaction was carried out in a fixed-bed stainless steel reactor (id=10mm), and the catalyst consumption was 1.0ml. Before the reaction, the catalyst was used at 350°C with 5NL / h of pure H 2 Restore 1h. The reactor was then lowered to 280 °C and switched to syngas (H 2 / CO=2), the flow rate is 12.5L / h, and ...
Embodiment 2
[0026] Weigh 10g of silica gel (product of Qingdao Haiyang Co., Ltd.) into a pressure vessel filled with 50ml of n-butanol, seal it, place it in a muffle furnace, raise it from room temperature to 80°C and keep it for 8h. After receiving, pour out the liquid, and dry the resulting solid at room temperature and then dry at 120°C for 12 hours. Then bake at 300°C for 4h. Take by weighing gained sample 2.0g, join in containing certain amount RhCl3, MnCl 2 , Methanol solution of LiCl, dried in the air, dried at 110°C for 16h, and calcined at 300°C for 8h, the obtained catalyst was designated as B. Catalyst composition Rh 1.0wt%; Mn 1.5wt%; Li 0.1wt%.
[0027] The evaluation of catalyst is the same as embodiment 1, reduction condition: 10%H 2 / N 2 , 300℃, 48h, 500h -1 ;Reaction conditions: 250℃, 5.0MPa, 8000h -1 , and the reaction results are shown in Table 1.
Embodiment 3
[0029]Weigh 10g of silica gel (product of Qingdao Haiyang Co., Ltd.) into an autoclave filled with 50ml of n-amyl alcohol, seal it and put it in a muffle furnace, and raise it from room temperature to 250°C and keep it for 4h. After receiving, the liquid was poured out, and the obtained solid was dried at room temperature and then dried overnight at 110°C. Then bake at 500°C for 4h. Weigh 2.0 g of the obtained sample, add it to an ethanol solution containing a certain amount of Rh, Mn, and Li nitrates, dry it in the air, dry it at 110°C for 4 hours, and calcinate it at 350°C for 4 hours. The obtained catalyst is designated as C. Catalyst composition Rh 1.5wt%; Mn 2.0wt%; Li 0.01wt%.
[0030] The evaluation of catalyst is the same as embodiment 1, reduction condition: 50%H 2 / N 2 , 500℃, 8h, 3000h -1 ;Reaction conditions: 300℃, 3.0MPa, 5000h -1 , and the reaction results are shown in Table 1.
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