Method for catalytically synthesizing 3-hydroxy-4-((trimethylsilyl) ethynyl) methyl benzoate
A technology of trimethylsilyl and methyl hydroxybenzoate, which is applied in chemical instruments and methods, silicon organic compounds, physical/chemical process catalysts, etc., can solve the problems of expensive catalysts, high production costs, and low recycling rates. Low-level problems, to achieve the effect of simple utilization, stable product quality, and easy recycling
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Embodiment 1
[0044] (1) Add 30ml of absolute ethanol to a 50ml three-necked round-bottomed flask, add 0.5ml of potassium nitrate solution (0.1mol / L) dropwise, stir and mix thoroughly, add 6ml of tetraisopropyl titanate, and stir vigorously until a white precipitate appears . After sealing, static aging for 24h. After centrifugation, washing with purified water, and drying at 60°C, the precursor of titanium dioxide was obtained. Place 0.2g of titanium dioxide precursor in a beaker and add 0.05wt.%H 2 O 2 40ml of the solution, 0.4g of solid sodium hydroxide was added after fully stirring, the mixture was placed in a hydrothermal kettle with a polytetrafluoroethylene lining, and the hydrothermal reaction was carried out at 180 ° C for 3 hours; washing. Add 20ml of hydrochloric acid (0.1mol / L) to the washed sample, soak it for 10 minutes, and then wash it with centrifugation, absolute ethanol, and deionized water to obtain the sample; the sample is dried at 60°C, ground, and then placed at...
Embodiment 2
[0051] (1) 30ml of absolute ethanol was added to a 50ml three-necked round-bottomed flask, 0.4ml of potassium nitrate solution (0.15mol / L) was added dropwise, and the mixture was fully stirred and mixed. Add 6 ml of tetraisopropyl titanate and stir vigorously until a white precipitate appears. After sealing, static aging for 24h. After centrifugation, washing with purified water, and drying at 60°C, the precursor of titanium dioxide was obtained. Place 0.2g of titanium dioxide precursor in a beaker and add 0.13wt.%H 2 O 2 40ml of the solution, 0.45g of solid potassium hydroxide was added after fully stirring, the mixture was placed in a hydrothermal kettle with a polytetrafluoroethylene lining, and the hydrothermal reaction was carried out at 160 ° C for 3.5 hours; washing. Add 20 ml of hydrochloric acid (0.1 mol / L) to the washed sample, and soak for 10 minutes. After centrifugation, washing with absolute ethanol and deionized water, the samples were obtained; the samples...
Embodiment 3
[0057] (1) 30ml methanol was added to a 50ml three-necked round bottom flask, 0.2ml potassium nitrate solution (0.75mol / L) was added dropwise, and the mixture was fully stirred and mixed. Add 6 ml of tetraisopropyl titanate and stir vigorously until a white precipitate appears. After sealing, static aging for 24h. After centrifugation, washing with purified water, and drying at 60°C, the precursor of titanium dioxide was obtained. Place 0.2g of titanium dioxide precursor in a beaker and add 0.20wt.%H 2 O 2 40ml of the solution, 0.45g of solid sodium hydroxide was added after fully stirring, the mixture was placed in a hydrothermal kettle with a polytetrafluoroethylene lining, and the hydrothermal reaction was carried out at 220 ° C for 4.5 hours; washing. Add 20 ml of hydrochloric acid (0.1 mol / L) to the washed sample, and soak for 10 minutes. After centrifugation, washing with absolute ethanol and deionized water, the samples were obtained; the samples were dried at 60 °...
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