A method for preparing aromatic esters and fatty acid esters by directional catalytic oxidation of lignin
A technology for catalytic oxidation and aromatic esters, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylic acid esters, etc., can solve the problems that have not been seen in the preparation of aromatic esters by multi-phase catalytic oxidation of lignin, and achieve equipment low cost effect
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Embodiment 1
[0015] Preparation of cerium oxide nanorods: Dissolve 3.47g of cerium nitrate hexahydrate in 20mL of deionized water, add it into a 200mL polytetrafluoroethylene liner, configure magnets, place it on a magnetic stirrer, and start stirring. 50.4 g of sodium hydroxide was dissolved in 140 mL of deionized water (9 mol / L), and then the sodium hydroxide solution was added dropwise to the cerium nitrate solution. After the sodium hydroxide solution was added dropwise, stirring was continued at room temperature for half an hour. After the stirring is finished, put the polytetrafluoroethylene liner into the stainless steel reaction kettle, seal the reaction kettle, put it in an oven, and react at 100°C for 72h. After the reaction, cool to room temperature, the solution is centrifuged by a centrifuge to separate the solid, and the obtained solid is washed 5 times with deionized water and absolute ethanol respectively. The solid was dried overnight in an oven, and then calcined in a muf...
Embodiment 2
[0017] Preparation of cerium oxide nanospheres: Take 1.736g of cerium nitrate hexahydrate and 0.294g of trisodium citrate, dissolve them in 160mL of deionized water, place them in a 200mL polytetrafluoroethylene liner, configure magnets, place them on a magnetic stirrer, Start stirring. Stir at room temperature for half an hour. After stirring, put the polytetrafluoroethylene liner into a stainless steel reaction kettle, seal the reaction kettle, put it in an oven, and react at 200°C for 24h. After heating, cool to room temperature, the solution is centrifuged to separate the solid, and the obtained solid is washed 5 times with deionized water and absolute ethanol respectively. The solid was dried overnight in an oven, and then calcined in a muffle furnace at 500 °C for 3 h.
Embodiment 3
[0019] Preparation of cerium oxide nano-squares: Dissolve 3.47g of cerium nitrate hexahydrate in 20mL of deionized water, put it into a 200mL polytetrafluoroethylene liner, configure magnets, place it on a magnetic stirrer, start stirring, and 33.6g of hydroxide Sodium was dissolved in 140mL deionized water (6mol / L), and then the sodium hydroxide solution was added dropwise to the cerium nitrate solution. After the sodium hydroxide solution was added dropwise, the stirring was continued for half an hour at room temperature. Put the PTFE liner into a stainless steel reaction kettle, seal the reaction kettle, put it in an oven, and react at 100°C for 24h. After heating, cool to room temperature, the solution is centrifuged to separate the solid, and the obtained solid is washed 5 times with deionized water and absolute ethanol respectively. The solid was dried overnight in an oven, and then calcined in a muffle furnace at 600 °C for 6 h.
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