Method for preparing alpha-phenethyl alcohol by taking zirconia-silica/graphene hybrid material as catalyst
A technology of silica and hybrid materials, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the influence of zirconia grain dispersion uniformity, is not suitable for large-scale industrial applications, increases Catalyst energy consumption and other issues to achieve the effect of improving operational safety, reducing reaction energy consumption, and less impurities
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Embodiment 1-6
[0027] Example 1-6: Preparation of α-phenylethyl alcohol with different zirconia-silicon ratio zirconia-silicon dioxide / graphene hybrid materials as catalysts
[0028] 1. Preparation methods of zirconia-silicon dioxide / graphene hybrid materials with different zirconium-silicon ratios:
[0029] 1) Preparation of graphene oxide suspension: disperse graphene oxide in 10 ml of ethanol according to Table 1, and obtain a brown-yellow graphene oxide suspension after ultrasonication for 1-3 h;
[0030]2) Preparation of zirconia / silica-graphene wet gel: Mix 3.9 ml zirconyl nitrate, 10 ml ethanol and 15 ml acetic acid, and add to the graphene oxide suspension obtained in step 1), mix well and mark It is solution A; according to the different proportions in Table 1, take tetraethyl orthosilicate (TEOS), mix well with 1.5 ml of water, 1 ml of hydrochloric acid, and 10 ml of ethanol, and mark it as solution B. Add solution B dropwise to solution A, and let stand for 15 min to obtain zirco...
Embodiment 7-10
[0043] Example 7-10: The reaction results of preparing α-phenylethyl alcohol with different graphene doping amounts of zirconia-silicon dioxide / graphene hybrid materials as catalysts
[0044] Preparation of zirconia-silicon dioxide / graphene hybrid material with different graphene doping amounts: other conditions are as in Example 1, the difference is that step 1) is doped by different graphene in Table 2 Measure graphite oxide, step 2) Solution B is obtained by mixing 8 ml tetraethyl orthosilicate (TEOS), 1.5 ml water, 1 ml hydrochloric acid and 10 ml ethanol.
[0045] Catalytic reaction conditions: Other conditions are as the catalytic reaction conditions of embodiment 1-6, difference is that embodiment 7-10 adopts 0.2wt%, 0.5wt%, 1wt% and 2wt%ZrO successively 2 -SiO 2 / GO hybrid material as catalyst, the results are shown in Table 2.
Embodiment 11-17
[0053] Embodiment 11-17: the catalytic reaction result of different reaction time
[0054] Other conditions are as the catalytic reaction condition of embodiment 1-6, and difference is that embodiment 11-17 all adopts Zr:Si=1:2, 1wt%ZrO 2 -SiO 2 The / GO hybrid material was used as a catalyst, and different reaction times were used, ranging from 2 to 10 h. The results are shown in Table 3.
[0055] Table 3 Examples 11-17 catalytic reaction results
[0056]
[0057] As can be seen from Table 3, with the increase of the reaction time, the conversion of acetophenone of the present invention first increases, and when the reaction exceeds 8 hours, the conversion rate of acetophenone decreases.
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