Preparation of carbon-loaded cobalt heterogeneous catalyst and application of carbon-loaded cobalt heterogeneous catalyst in catalysis of olefin hydroformylation reaction
A heterogeneous catalyst, cobalt catalyst technology, applied in the field of catalysts and composite materials, to achieve the effects of enhanced interaction, good catalytic activity and selectivity, and low cost
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Embodiment 1
[0021] Weigh 2.20 g (20 mmol) resorcinol and 22 mg Na 2 CO 3 Dissolve in 9 ml of water, then add 3.246 g (40 mmol) formaldehyde aqueous solution and stir evenly, put it into a 100 mL polytetrafluoroethylene stainless steel hydrothermal reaction kettle, seal it and place it in an oven at 80°C for 24 hours. The cured wet gel was taken out, ground and dried in vacuum at 130 °C for 3 h. Take 1.5 g of the obtained material and KOH at a mass ratio of 1:1, mix and grind, mix evenly, place in a tube furnace at 800 °C, and carbonize for 5 h under nitrogen; the carbonized material is washed with deionized water until neutral, and then Dry at 80°C for 12 hours to obtain 750 mg of carbon material, which is designated as C-1.
[0022] Weigh 0.5 g of C-1 and add it to 25 mL of deionized water, then add 1 mL of cobalt chloride solution with a cobalt concentration of 5 mg / mL, and stir for 3.0 h; then add NaOH solution dropwise to the above solution to adjust the pH of the solution value to...
Embodiment 2
[0024] Weigh 2.20 g (20 mmol) resorcinol and 11 mg K 2 CO 3 Dissolve in 12 ml water, then add 1.623 g (20 mmol) formaldehyde aqueous solution and stir evenly, put it into a 100 mL polytetrafluoroethylene stainless steel hydrothermal reaction kettle, seal it and place it in an oven at 80°C for 24 hours; The wet gel was taken out and dried under vacuum at 100° C. for 5 h after grinding. 1.5 g of the obtained material was mixed and ground with NaOH at a mass ratio of 1:1.5, mixed evenly, placed in a tube furnace at 900 °C, and carbonized for 4 h under nitrogen. The carbonized material was washed with deionized water until neutral, and dried at 80 °C for 12 h. Finally, 750 mg of carbon material was obtained, denoted as C-2.
[0025] Weigh 0.5 g of C-2 and add it to 25 mL of deionized water, then add 1 mL of cobalt nitrate solution with a cobalt concentration of 0.5 mg / mL, and continue stirring for 2.0 h. Then ammonia solution was added dropwise to the above solution to adjust ...
Embodiment 3
[0027] Weigh 2.20 g (20 mmol) resorcinol and 22 mg Na 2 CO 3 Dissolve in 20 ml of water, then add 4.869 g (60 mmol) of formaldehyde in aqueous solution and stir evenly, put it into a 100 mL polytetrafluoroethylene stainless steel hydrothermal reaction kettle, seal it and place it in a 120°C oven for 24 hours. After the cured wet gel was taken out, it was ground and dried in vacuum at 150 °C for 1 h. 1.5 g of the obtained material was mixed and ground with LiOH at a mass ratio of 1:1, mixed evenly, placed in a tube furnace at 1000 °C, and carbonized for 1 h under nitrogen. The carbonized material was washed with deionized water until neutral, and dried at 80 °C for 12 h. Finally, 750 mg of carbon material was obtained, denoted as C-3.
[0028] Weigh 1.0 g of C-3 into 25 mL of deionized water, and then add 1 mL of CoCl with a cobalt concentration of 0.5 mg / mL 2 The solution was stirred for 3.5h. Then KOH solution was added dropwise to the above solution to adjust the pH val...
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