Preparation of metal doped mesoporous silicon dioxide solid catalyst and application of metal doped mesoporous silicon dioxide solid catalyst in biomass conversion
A technology of mesoporous silica and solid catalysts, applied in physical/chemical process catalysts, chemical/physical processes, organic chemistry, etc., can solve the problems of harsh reaction conditions, low activity, cumbersome catalyst preparation, etc., and achieve simple preparation methods , good catalytic activity and stability, and good reusability
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Embodiment 1
[0026] (1) Preparation of zirconium-doped mesoporous silica catalyst
[0027] Weigh 0.9 g of block polyether F68 template and dissolve it in 45 mL of 0.4 mol / L hydrochloric acid, then weigh 20 mmol of tetraethyl orthosilicate and 2 mmol of zirconium oxychloride and add to the above dissolved template hydrochloric acid solution, stirred at 45 °C for 24 h. Then transferred to a 100 mL hydrothermal reactor, heat treated at 100 °C for 24 h; filtered, washed, dried overnight at 80 °C, and finally calcined at 450 °C for 6 h to obtain a zirconium-doped solid acid catalyst.
[0028] (2) Zirconium-doped mesoporous silica catalyst catalyzes the conversion of ethyl acetate to gamma -valerolactone
[0029] Weigh 1 mmol of ethyl levulinate, 0.1 g of zirconium-doped mesoporous silica, and 5 mL of isopropanol in a 25 mL polytetrafluoroethylene-lined hydrothermal reactor. C for 6 h. After the reaction, cool immediately, take a small amount of reaction liquid to filter, and send it to gas...
Embodiment 2
[0033] With the catalyst catalyst recovery in embodiment 1, ethyl levulinate is converted into gamma - valerolactone. The reaction feed and reaction conditions are the same as in Example 1. Obtain the transformation efficiency of ethyl levulinate by gas phase detection 94.4%, gamma - The yield of valerolactone is 85.5%.
Embodiment 3
[0040] (1) Preparation of aluminum-doped mesoporous silica solid catalyst
[0041]Weigh 0.9 g of block polyether F68 template and dissolve in 45 mL of 0.4 mol / L hydrochloric acid, then weigh 20 mmol of tetraethyl orthosilicate and 2 mmol of aluminum nitrate and add to the above hydrochloric acid dissolved in template The solution was stirred at 45 °C for 24 h. Then transferred to a 100 mL hydrothermal reactor, heat treated at 100 °C for 24 h; filtered, washed, dried overnight at 80 °C, and finally calcined at 450 °C for 6 h to obtain an aluminum-doped solid acid catalyst .
[0042] (2) Al-doped mesoporous silica catalyzes the conversion of ethyl levulinate to gamma -valerolactone
[0043] Weigh 1 mmol of ethyl levulinate, 0.1 g of aluminum-doped mesoporous silica, and 5 mL of isopropanol in a 25 mL polytetrafluoroethylene-lined hydrothermal reactor. C for 6 h. After the reaction, cool immediately, take a small amount of reaction liquid to filter, and send it to gas chroma...
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