Preparation method and application of carbon-based solid acid
A technology for carbon-based solid acids and uses, applied in chemical instruments and methods, organic chemistry, physical/chemical process catalysts, etc., can solve the problems of large inorganic acid pollution and high price of ionic liquids, achieve strong industrialization significance, and simple synthesis route , Environmentally friendly effect
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Embodiment 1
[0027] Dissolve 1g of glucose in 1mL of deionized water, stir the solution at room temperature for 3h, add 1.0g of phosphoric acid (commercially available phosphoric acid contains 85wt%), stir for 2h, then dry at 100°C for 24h, and calcine in nitrogen atmosphere at 300°C for 4 hours. , using TEM to detect the structure of the catalyst, the results are as follows figure 1 shown.
[0028] Take 0.2g of the catalyst obtained above, 1.2g of fructose, add 20mL of water and 30mL of sec-butanol, seal, react at 160°C for 3h, filter the reaction solution and detect it with ion chromatography, levulinic acid (LA) and 5-hydroxymethyl The yields of furfural (HMF) were 6.90% and 89.08%, respectively. It can be seen from the experimental results that the phosphorylated carbon-based solid acid has a good effect on catalyzing the conversion of sugar into the platform compound HMF.
[0029] Wherein the LA detection condition is: mobile phase is 1mM NaOH solution, flow rate is 1.0ml / min, condu...
Embodiment 2
[0031] Dissolve 1 g of fructose in 5 mL of deionized water, stir the solution at room temperature for 3 h, add 1.25 g of sulfuric acid, stir for 2 h, then dry at 80°C for 24 h, and then calcinate at 300°C for 4 h in a nitrogen atmosphere.
[0032] Take 0.2g of the catalyst obtained above, 1.2g of fructose, add 20mL of water and 30mL of sec-butanol, seal, react at 160°C for 180min, filter the reaction solution and detect it with ion chromatography, the yields of LA and HMF are 10.27% and 57.20% respectively. %.
Embodiment 3
[0034] Dissolve 1 g of glucose in 1 mL of deionized water, stir the solution at room temperature for 3 h, add 0.1 g of phosphoric acid, stir for 2 h, then dry at 100°C for 12 h, and calcine at 300°C for 2 hours in a nitrogen atmosphere.
[0035] Take 0.2g of the catalyst obtained above, 1.2g of glucose, add 20mL of water and 30mL of sec-butanol, seal, react at 160°C for 180min, filter the reaction solution and detect it with ion chromatography, the yields of LA and HMF are 5.12% and 54.20% respectively. %.
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