Preparation method of mesoporous alumina catalyst
A mesoporous alumina and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high price, high equipment requirements, difficult control of hydrolysis and polycondensation process, etc. Achieve high activity and stability, simple preparation process
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Embodiment 1
[0024] Weigh 22.076 grams of aluminum nitrate and 15.249 grams of hexamethylenetetramine, add 250 milliliters of deionized water, then stir to dissolve them, and record it as solution A. Weigh 0.429 g of cetyltrimethylammonium bromide, add 40 g of n-butanol, stir to dissolve it, and record it as solution B. Mix solution A and solution B in a polytetrafluoroethylene-lined autoclave with a certain volume, and stir for 30 minutes to seal it. Put the reaction kettle into an oil bath, and heat it for 24 hours without stirring, and the reaction temperature is 150°C. After the reaction, the reactor was cooled to room temperature, and vacuum filtered. Then wash with 2 liters of deionized water for 5 times, rinse with 50 milliliters of ethanol, and then transfer to a 60° C. vacuum oven to dry for 12 hours. Put the dried product into a muffle furnace and bake at 550°C for 4 hours to obtain a highly active mesoporous alumina catalyst.
[0025] Weigh 0.2 g of the mesoporous alumina cat...
Embodiment 2
[0029]Referring to the preparation steps and reaction conditions in Example 1, the difference is that 1.072 grams of cetyltrimethylammonium bromide is added.
[0030] Weigh 0.2 g of the catalyst prepared by the above method with a particle size of 40-60 mesh, and evaluate the methanol dehydration activity in a fixed-bed reactor. Reaction conditions: reaction temperature 210-295°C, reaction liquid feed flow rate / catalyst volume liquid air velocity for 30 hours -1 . The conversion of methanol at 284°C was 90.2% (close to the equilibrium conversion).
Embodiment 3
[0032] Referring to the preparation steps and reaction conditions in Example 1, the difference is that the reaction temperature is 160°C.
[0033] Weigh 0.2 g of the catalyst prepared by the above method with a particle size of 40-60 mesh, and evaluate the methanol dehydration activity in a fixed-bed reactor. Reaction conditions: reaction temperature 210-295°C, reaction liquid feed flow rate / catalyst volume liquid air velocity for 30 hours -1 . The conversion of methanol at 295°C was 89.1% (close to the equilibrium conversion).
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