Biological reduction preparing method of styrene epoxidized gold catalyst
A gold epoxidation and catalyst technology, which is applied in the field of biological reduction preparation of styrene epoxidation gold catalysts, can solve the problems of environmental pollution of halogen-containing wastewater, equipment corrosion, large energy consumption and material consumption, and achieve high reactivity, The effect of mild conditions in the reduction process
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Embodiment 1
[0026] Preparation of plant leaf extract: Accurately weigh 0.25g of Arborvitae leaf dry powder, add 25mL of deionized water, place in a constant temperature water bath shaker at 30°C, shake and extract at a speed of 150r / min for 1h, vacuum filter and take Filtrate and be settled to 25mL, obtain the concentration and be the extract of oriental cypress leaves of 10g / L.
[0027] Preparation of chloroauric acid aqueous solution: Accurately weigh 1 g of chloroauric acid solid powder, dissolve it in 30 mL of deionized water, and then use deionized water to make the volume to 50 mL, and the concentration of the obtained chloroauric acid aqueous solution is 48.56 mmol / L.
[0028] Catalyst preparation: Take 25 mL of the above extract, add 260 μL of chloroauric acid aqueous solution to it, sonicate at 30°C for 10 min, stir for 1 h, then add 0.5 g of TS-1 carrier, continue stirring for 1 h, and vacuum filter to obtain a solid After drying in vacuum at 50°C for 12h, the catalyst was activ...
Embodiment 2
[0033] Preparation of plant leaf extract: Accurately weigh 0.5g of Arborvitae leaf dry powder, add 50mL of deionized water, place in a constant temperature water bath shaker at 30°C, shake and extract at a speed of 150r / min for 2h, and take after vacuum filtration Filtrate and be settled to 50mL, obtain the concentration and be the extract of oriental cypress leaves of 10g / L.
[0034] Preparation of the catalyst: Take 50 mL of the above extract, add 520 μL of the chloroauric acid aqueous solution prepared in Example 1, ultrasonicate at 60° C. for 20 min, stir for 2 h, then add 0.5 g of TS-1 carrier, and continue stirring for 2 h After vacuum filtration, the resulting solid was vacuum-dried at 50° C. for 12 hours and then calcined and activated for 6 hours at 450° C. in an air atmosphere to obtain catalyst B.
[0035] Catalyst evaluation conditions are the same as in Example 1, and the catalytic reaction results are shown in Table 1.
Embodiment 3
[0037] Preparation of plant leaf extract: Accurately weigh 0.5g of Arborvitae leaf dry powder, add 50mL of deionized water, place in a constant temperature water bath shaker at 30°C, vibrate and extract at a speed of 150r / min for 1h, vacuum filter and take Filtrate and be settled to 50mL, obtain the concentration and be the extract of oriental cypress leaves of 10g / L.
[0038] Preparation of the catalyst: Take 50 mL of the above extract, add 520 μL of the chloroauric acid aqueous solution prepared in Example 1 to it, sonicate at 60° C. for 10 min, stir for 1 h, then add 0.5 g of TS-1 carrier, and continue stirring for 1 h After vacuum filtration, the obtained solid was vacuum-dried at 50° C. for 12 hours and then calcined and activated for 3 hours at 350° C. in an air atmosphere to obtain catalyst C.
[0039] Catalyst evaluation conditions are the same as in Example 1, and the catalytic reaction results are shown in Table 1.
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