Phenol hydrogenation catalyst and preparation method thereof
A technology of hydrogenation catalyst and phenol, which is applied in the field of catalysis and can solve problems such as complex process and difficult conditions
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Embodiment 1
[0031] (1) ZIF-67-TiO 2 preparation of
[0032] First prepare 50 mL of 0.8 mol / L methanol solution of 2-methylimidazole and 50 mL of 0.1 mol / L methanol solution of cobalt nitrate hexahydrate. 0.01 g TiO 2 Disperse in 50 mL of 20 g / L polyvinylpyrrolidone methanol solution, stir for 10 min, put the 2-methylimidazole solution in, continue stirring for 10 min, add Co(NO 3 ) 2 ·6H 2 O methanol solution, after mixing and stirring for 10 h, stop stirring, and let the mixture stand at room temperature for 1 h. After standing, the product was separated by centrifugation, washed 3 times with methanol, and finally washed at 80 o Dry in an oven at C for 6 h, and the sample is denoted as ZIF-67-TiO 2 -0.01.
[0033] (2) CN-TiO 2 Preparation of vector
[0034] Take 0.5 g of prepared ZIF-67-TiO 2 -0.01 In a tube furnace, the calcination atmosphere is argon, and the calcination temperature is 600 o C, the calcination time is 5 h. The temperature is raised from room temperature to ...
Embodiment 2
[0040] (1) ZIF-67-TiO 2 preparation of
[0041] First, prepare 50 mL of 1.6 mol / L methanol solution of 2-methylimidazole and 50 mL of 0.05 mol / L methanol solution of cobalt nitrate hexahydrate. 0.05 g TiO 2 Disperse in 50 mL of 10 g / L polyvinylpyrrolidone methanol solution, stir for 30 min, put 2-methylimidazole solution in, continue stirring for 10 min, add Co(NO 3 ) 2 ·6H 2 O methanol solution, mixed and stirred for 8 h and then stopped stirring, and the mixture was allowed to stand at room temperature for 5 h. After standing, the product was separated by centrifugation, washed 5 times with methanol, and finally washed at 50 o Dry in an oven at C for 24 h, and the sample is denoted as ZIF-67-TiO 2 -0.05.
[0042] (2) CN-TiO 2 Preparation of vector
[0043] Take 0.5 g of prepared ZIF-67-TiO 2 -0.05 In a tube furnace, the calcination atmosphere is helium, and the calcination temperature is 550 o C, the calcination time is 8 h. The temperature is raised from room te...
Embodiment 3
[0048] (1) ZIF-67-TiO 2 preparation of
[0049] First, prepare 50 mL of 0.4 mol / L methanol solution of 2-methylimidazole and 50 mL of 0.2 mol / L methanol solution of cobalt nitrate hexahydrate. 0.1 g TiO 2 Disperse in 50 mL of 40 g / L polyvinylpyrrolidone methanol solution, stir for 20 min, put 2-methylimidazole solution in, continue stirring for 30 min, add Co(NO 3 ) 2 ·6H 2 O methanol solution, after mixing and stirring for 20 h, stop stirring, and the mixture was directly separated from the product by centrifugation, and washed twice with ethanol, and finally at 70 o Dry in an oven at C for 12 h, and the sample is denoted as ZIF-67-TiO 2 -0.1.
[0050] (2) CN-TiO 2 Preparation of vector
[0051] Take 0.5 g of prepared ZIF-67-TiO 2 -0.1 In a tube furnace, the calcination atmosphere is nitrogen, and the calcination temperature is 800 o C, the calcination time is 4 h. The temperature is raised from room temperature to the target temperature at a rate of 4 o C / min. C...
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