A multi-acid@alumina composite catalytic material and its preparation method
A technology of composite catalytic materials and alumina balls, which is applied in the preparation of organic compounds, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. It is easy to be affected by active components and other problems, and achieves good catalytic performance, improved cycle stability, reaction time and the effect of reducing the amount of hydrogen peroxide
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Embodiment 1
[0020] 1) Calcining γ-alumina balls at 500°C for 22 hours and cooling to room temperature;
[0021] 2) Add 4g of Na 12 [α-P 2 W 15 o 56 ]·24H 2 O and 20g of calcined γ-alumina balls were dispersed in 500mL of water, the pH value of the solution was adjusted to 1.5 with hydrochloric acid, the magnetic stirring reaction was performed at room temperature for 2 hours, the temperature was raised to 80°C and the magnetic stirring reaction was continued for 2 hours, filtered, and 2mol / L lithium chloride solution to wash the product three times, and vacuum-dried at 60°C for 12 hours to obtain the polyacid@alumina nanocomposite catalytic material.
[0022] The polyacid@alumina nanocomposite catalytic material prepared above was used to catalyze the oxidation reaction of sulfide: weigh 2.5 μmol of the synthesized polyacid@alumina nanocomposite catalytic material in a round bottom flask, and then successively add 1 mmol of benzyl sulfide Add ether, 1mmol hydrogen peroxide and 200μL...
Embodiment 2
[0026] 1) Calcining gamma-alumina balls at 500°C for 25 hours and cooling to room temperature;
[0027] 2) Add 4g of Na 8 H[A-PW 9 o 34 ]·7H 2 O and 20 g of calcined γ-alumina balls were dispersed in 500 mL of water, and the pH value of the solution was adjusted to 0.5 with hydrochloric acid, and the magnetic stirring reaction was carried out at room temperature for 3 hours, and the temperature was raised to 85 ° C to continue the magnetic stirring reaction for 2 hours, filtered, and the aqueous solution The product was washed three times, and vacuum-dried at 60°C for 12 hours to obtain the polyacid@alumina nanocomposite catalytic material.
[0028] The polyacid@alumina nanocomposite catalytic material prepared above was used to catalyze the oxidation reaction of sulfide: weigh 2.5 μmol of the synthesized polyacid@alumina nanocomposite catalytic material in a round bottom flask, and then successively add 1 mmol of benzyl sulfide Add ether, 1mmol hydrogen peroxide and 200μL...
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