Co load MFI molecular sieve with hexagonal prism shape and preparation method thereof
A technology of hexagonal prism and molecular sieve, which is applied in the field of Co-loaded MFI molecular sieve with hexagonal prism shape and its preparation, which can solve the problems of limiting the use of molecular sieves and the collapse of molecular sieve structures, and achieves good industrial application prospects, uniform particle size, and mild reaction process easy to control effects
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Embodiment 1
[0028] Take 25.8 grams of tetrapropylammonium hydroxide and 130 milliliters of deionized water to make solution A; take 0.13 grams of cobalt nitrate hexahydrate and dissolve it in 30 milliliters of deionized water to make cobalt nitrate solution. Under vigorous stirring, cobalt nitrate solution and 15.5 g of tetraethyl orthosilicate were added dropwise to solution A (pH=9 or so after dropping), stirred at 0°C for 6.5 hours and then warmed up to room temperature. Then it was poured into the reactor and crystallized at 170°C for 72 hours. Finally, the precipitate was washed twice with deionized water and ethanol, dried at 80°C, ground and calcined at 550°C for 7 hours to obtain the catalyst Co-MFI (n(Si) / n(Co) =100), the electron microscope picture is attached figure 1 shown.
Embodiment 2
[0030] Take 25.8 grams of tetrapropylammonium hydroxide and 56 milliliters of deionized water to make solution A; take 0.13 grams of cobalt nitrate hexahydrate and dissolve it in 30 milliliters of deionized water to make cobalt nitrate solution. Under vigorous stirring, cobalt nitrate solution and 25.5 g of tetraethyl orthosilicate were added dropwise to solution A (pH=9 or so after dropping), stirred at 0°C for 4 hours and then warmed up to room temperature. Then it was poured into the reactor and crystallized at 170°C for 72 hours. Finally, the precipitate was washed twice with deionized water and ethanol, dried at 80°C, ground and calcined at 550°C for 7 hours to obtain the catalyst Co-MFI (n(Si) / n(Co) =100), the electron microscope picture is attached figure 1 shown.
Embodiment 3
[0032] Take 15.8 grams of tetrapropylammonium hydroxide and 16 milliliters of deionized water to make solution A; take 1.3 grams of cobalt nitrate hexahydrate and dissolve it in 5 milliliters of deionized water to make cobalt nitrate solution. Under vigorous stirring, cobalt nitrate solution and 35.5 g of tetraethyl orthosilicate were added dropwise to solution A (pH=9 or so after dropping), stirred at 0°C for 8 hours and then warmed up to room temperature. Then it was poured into the reactor and crystallized at 170°C for 72 hours. Finally, the precipitate was washed twice with deionized water and ethanol, dried at 80°C, ground and calcined at 550°C for 7 hours to obtain the catalyst Co-MFI (n(Si) / n(Co) =100), the electron microscope picture is attached figure 1 shown.
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