A catalyst in the synthesis process of methyl glycolate and its preparation method and application
A technology of methyl glycolate and catalyst, which is applied in the field of ester hydrogenation catalyst preparation and application, can solve the problems of poor stability and low product selectivity, and achieve the effect of high stability
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Embodiment 1
[0029] Cu(NO 3 ) 2 ·3H 2 O was dissolved into an aqueous solution with a concentration of 0.15 mol / L. Measure 225 mL of the solution in a beaker, and add 15 mL of ammonia water while stirring. Weigh 6.0g of white carbon black, add it into the above solution with stirring, then stir and age in a 35°C water bath for 6 hours, raise the temperature to 80°C to distill ammonia until the pH value of the solution in the beaker reaches 6-8 and stop. The resulting solid was washed with deionized water until the pH reached 7, then dried at 100°C for 24 hours, and then calcined at 450°C for 8 hours.
[0030] After the above samples were pressed into tablets, they were placed in a 30% trichloromethylsilane toluene solution and refluxed for 24 hours. After washing, dry at 120°C for 10 hours.
[0031] The above samples were immersed in ethanol aqueous solution of ammonium fluoride for 5 hours, wherein the mass fraction of ammonium fluoride was 30%, and the ratio of ethanol to water was 1...
Embodiment 2
[0035] Cu(NO 3 ) 2 ·3H 2 O was dissolved into an aqueous solution with a concentration of 0.15 mol / L. Measure 225 mL of the solution in a beaker, and add 15 mL of ammonia water while stirring. Weigh 6.0g of white carbon black, add it into the above solution with stirring, then stir and age in a 35°C water bath for 6 hours, raise the temperature to 80°C to distill ammonia until the pH value of the solution in the beaker reaches 6-8 and stop. The resulting solid was washed with deionized water until the pH reached 7, then dried at 100°C for 24 hours, and then calcined at 450°C for 8 hours.
[0036]After the above samples were pressed into tablets, they were placed in a 30% trichloromethylsilane toluene solution and refluxed for 24 hours. After washing, dry at 120°C for 10 hours.
[0037] The above samples were immersed in ethanol aqueous solution of ammonium fluoride for 5 hours, wherein the mass fraction of ammonium fluoride was 30%, and the ratio of ethanol to water was 1:...
Embodiment 3
[0041] Cu(NO 3 ) 2 ·3H 2 O was dissolved into an aqueous solution with a concentration of 0.15 mol / L. Measure 225 mL of the solution in a beaker, and add 15 mL of ammonia water while stirring. Weigh 6.0g of white carbon black, add it into the above solution with stirring, then stir and age in a 35°C water bath for 6 hours, raise the temperature to 80°C to distill ammonia until the pH value of the solution in the beaker reaches 6-8 and stop. The resulting solid was washed with deionized water until the pH reached 7, then dried at 100°C for 24 hours, and then calcined at 450°C for 8 hours.
[0042] After the above samples were pressed into tablets, they were placed in a 30% trichloromethylsilane toluene solution and refluxed for 24 hours. After washing, dry at 120°C for 10 hours.
[0043] The above samples were immersed in ethanol aqueous solution of ammonium fluoride for 5 hours, wherein the mass fraction of ammonium fluoride was 30%, and the ratio of ethanol to water was 1...
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