Process for synthesizing single-phase sodalite from fly ash
A technology of fly ash and single-phase square, which is applied in the field of production and preparation of inorganic functional materials, achieving the effect of wide synthesis conditions, good reproducibility, and high cost
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[0025] Preparation of activated fly ash:
[0026] No. 1 activated fly ash: mix the fly ash and sodium hydroxide according to 1:2 and put it in the muffle furnace, and mix it with 10 o C / min heating rate increased to 600 o C, keep it warm for 4 hours, then cool down to room temperature at the same rate, and get No. 1 activated fly ash after grinding.
[0027] No. 2 activated fly ash: mix the fly ash and sodium hydroxide according to 1:1 and put it in the muffle furnace, and mix it with 5 o C / min heating rate increased to 700 o C, keep warm for 3 hours, then cool down to room temperature at the same rate, and get No. 2 activated fly ash after grinding.
[0028] No. 3 activated fly ash: mix the fly ash and sodium hydroxide according to 3:2 and put them in the muffle furnace, and use 2 o C / min heating rate increased to 800 o C, keep it warm for 2 hours, then cool down to room temperature at the same rate, and get No. 3 activated fly ash after grinding.
Embodiment 1
[0030] 4 g of No. 1 activated fly ash, Al(OH) 3 0.4 g and 5 mol / L NaOH 60 mL were sequentially added into the polytetrafluoroethylene liner, mixed evenly, sealed and placed in 100 o C in an electric constant temperature drying oven for 24 h, the crystallized product was repeatedly filtered, washed until neutral, and dried to obtain a single-phase sodalite material. Depend on figure 1 It can be seen that there is only one zeolite phase, sodalite, in the synthesized product, and the crystallinity is relatively high.
Embodiment 2
[0032] 4 g of No. 1 activated fly ash, Al(OH) 3 0.8 g and 5 mol / L NaOH 60 mL were sequentially added into the polytetrafluoroethylene liner, mixed evenly, sealed and placed in 100 o C in an electric constant temperature drying oven for 24 h, the crystallized product was repeatedly filtered, washed until neutral, and dried to obtain a single-phase sodalite material. Depend on figure 1 It can be seen that there is only one zeolite phase, sodalite, in the synthesized product, and the crystallinity is relatively high.
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