A kind of catalyst for cinnamaldehyde MPV reduction to prepare cinnamyl alcohol composite oxide and preparation method thereof
A catalyst, cinnamaldehyde technology, applied in the preparation of hydroxyl compounds, the preparation of organic compounds, catalysts for physical/chemical processes, etc., can solve the problems that do not conform to atomic economy and green chemistry, the separation of catalysts and products is difficult, and the separation of products is difficult. Achieve the effects of good cinnamyl alcohol selectivity, low cost, and cheap and easy-to-obtain raw materials
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Embodiment 1
[0038] Accurately weigh 1.2g γ-Al 2 o 3 The nanotube powder was dried in an oven at 120° C. for 2 hours, and set aside. Measure 0.35 g of butyl titanate and dissolve in a mixed solution of ethanol and toluene (volume ratio 1:1). The dried γ-Al 2 o 3 The nanotubes were slowly added into a mixed solution of ethanol and toluene, stirred at 25° C. for 20 hours, and then centrifuged. The supernatant was discarded, and the lower layer was taken to precipitate. The centrifuged product was dried in an oven at 120° C. for 4 hours, and then ground into powder. Finally, the obtained powder was placed in a tube furnace, and the temperature was programmed to 400°C at a rate of 5°C / min in an air atmosphere, and after 2 hours of calcination, it was switched to 5% H 2 / N 2 Gas was programmed to heat up to 500°C at a rate of 10°C / min and calcined for 2 hours to prepare the MPV reduction catalyst. The composition and internal structure of the catalyst were characterized by X-ray powder d...
Embodiment 2
[0040] Accurately weigh 1.5g γ-Al 2 o 3 The nanotube powder was dried in an oven at 100° C. for 2 hours, and set aside. Measure 0.4 g of butyl titanate and dissolve in a mixed solution of ethanol and toluene (volume ratio 1:1). The dried γ-Al 2 o 3 The nanotubes were slowly added into a mixed solution of ethanol and toluene, stirred at 30° C. for 20 hours, and then centrifuged. The supernatant was discarded, and the lower layer was removed. The centrifuged product was dried in an oven at 100°C for 6 hours, and then ground into powder. Finally, the obtained powder was placed in a tube furnace, and the temperature was programmed to 500 °C at a rate of 5 °C / min in an air atmosphere, and after 4 hours of calcination, it was switched to 5% H 2 / N 2 Gas was programmed to heat up to 600°C at a rate of 10°C / min and calcined for 3 hours to prepare the MPV reduction catalyst. The morphology of the catalyst was characterized by high-power transmission electron microscopy, such as ...
Embodiment 3
[0042]Accurately weigh 2g γ-Al 2 o 3 The nanotube powder was dried in an oven at 120° C. for 2 hours, and set aside. Measure 0.6 g of butyl titanate and dissolve in a mixed solution of ethanol and toluene (volume ratio 1:1). The dried γ-Al 2 o 3 The nanotubes were slowly added into a mixed solution of ethanol and toluene, stirred at 20° C. for 24 hours, then centrifuged, the supernatant was poured off, and the lower layer was removed. The centrifuged product was dried in an oven at 120° C. for 4 hours, and then ground into powder. Finally, the obtained powder was placed in a tube furnace, and the temperature was programmed to 400 °C at a rate of 5 °C / min in an air atmosphere, and after 4 hours of calcination, it was switched to 5% H 2 / N 2 Gas was programmed to heat up to 600°C at a rate of 10°C / min and calcined for 4 hours to prepare the MPV reduction catalyst.
[0043] The hydrogenation reaction test of cinnamaldehyde was done in a liquid phase reactor. The MPV reduc...
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