Method for preparing acid mesoporous molecular sieve by using sodium persulfate and application of acid mesoporous molecular sieve
A mesoporous molecular sieve and sodium persulfate technology, which is applied in the direction of carboxylate preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of weak stability, weak acidity, low catalytic activity, etc., and achieve the effect of strong stability
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Embodiment 1
[0019] 3.2g CTAB surfactant was stirred in 20ml water at 40°C for 1h until clear, 12.5g Na2SiO3·9H2O was dissolved in 10ml water and stirred at 40°C for 1h until clear, then cooled to room temperature; 0.1g sodium persulfate was dissolved in 10ml In deionized water, irradiate with ultraviolet light at room temperature for 0.5h, then slowly drop the irradiated sodium persulfate solution into the sodium silicate solution and continue to illuminate for 0.5h, then slowly drop the mixed solution of sodium persulfate and sodium silicate Add to CTAB solution and mix, stir for 15min, then adjust the pH to 10.5 with 2mol / L hydrochloric acid, continue to stir at 25°C for 3h, irradiate the obtained homogeneous gel with ultraviolet light at room temperature for 3h, and transfer the homogeneous gel to poly It was crystallized in a tetrafluoroethylene crystallization kettle, then filtered and washed with deionized water, dried in an oven at 105°C for 24 hours, and finally calcined in a muffl...
Embodiment 2
[0021] 3.2g CTAB surfactant was stirred in 20ml water at 40°C for 1h until clear, 12.5g Na2SiO3·9H2O was dissolved in 10ml water and stirred at 40°C for 1h until clear, then cooled to room temperature; 0.1g sodium persulfate was dissolved in In ionized water, irradiate with ultraviolet light at room temperature for 0.5h, then slowly add the irradiated sodium persulfate solution into the sodium silicate solution and continue to illuminate for 0.5h, then slowly add the mixed solution of sodium persulfate and sodium silicate Mix in the CTAB solution, stir for 15 minutes, then adjust the pH to 10.5 with 2mol / L hydrochloric acid, continue to stir for 3 hours at 25°C, irradiate the obtained homogeneous gel with ultraviolet light at room temperature for 3 hours, and transfer the obtained homogeneous gel to polytetrafluoroethylene Crystallize in a vinyl fluoride crystallization kettle, then wash with deionized water, dry in an oven at 100°C for 12 hours, and finally calcinate in a muff...
Embodiment 3
[0023] 1.6g CTAB surfactant was stirred in 20ml water at 25°C for 1h until clear, 12.5g Na 2 SiO 3 9H 2 O dissolved in 10ml of water, stirred at 25°C until clear, then cooled to room temperature; dissolved 0.1g of sodium persulfate in deionized water, irradiated with ultraviolet light for 0.5h at room temperature, and then slowly irradiated sodium persulfate solution Add dropwise into the sodium silicate solution and continue to illuminate for 1h, then slowly add the mixed solution of sodium persulfate and sodium silicate into the CTAB solution dropwise and mix, stir for 15min, then adjust the pH to 11.0 with 2mol / L hydrochloric acid, at 25°C Continue to stir for 3 hours, irradiate the obtained homogeneous gel under ultraviolet light at room temperature for 1 hour, transfer the obtained homogeneous gel to a polytetrafluoroethylene crystallization kettle for crystallization, then filter and wash with deionized water, and dry in an oven at 120°C 24h, and finally calcined in a ...
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