Method for preparing nay-type molecular sieve and high-silica mordenite from fly ash acid extraction residue and utilization method of fly ash
A technology for extracting aluminum residue and mordenite, which is applied in the direction of octahedral crystalline aluminum silicate zeolite, mercerized crystalline aluminum silicate zeolite, chemical instruments and methods, etc., to achieve omission of extraction and separation operations, efficient resource utilization, and considerable environmental benefits Effect
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preparation example 1
[0081] This preparation example illustrates the preparation of fly ash to obtain the aluminum extraction residue of fly ash acid method.
[0082] Take 100g of fly ash, add 5mol / L hydrochloric acid solution, stir and react at 150°C for 30min, filter and wash to obtain aluminum-rich solution and fly ash acid extraction aluminum residue.
[0083] The chemical composition of the fly ash acid extraction aluminum residue is shown in Table 2.
preparation example 2
[0085] This preparation illustrates the preparation of NaY directing agent.
[0086] Sodium metaaluminate, sodium hydroxide, water glass and deionized water, according to Na 2 O: Al 2 o 3 :SiO2 2 :H 2 The molar mass ratio of O=10.7:1:9.8:215 was mixed and aged at 35° C. for 24 hours to obtain the NaY directing agent.
[0087] SiO in directing agent 2 The content is 152.6g / L.
Embodiment 1
[0089] (1) Add 50g of fly ash acid extraction aluminum residue to Na 2 CO 3 60g of solid powder, mixed and ground, roasted at 860°C for 90 minutes, cooled rapidly in air after the roasting, and crushed to below about 200 mesh to obtain roasted slag;
[0090] (2) After the roasted slag material is subjected to dry magnetic separation to remove iron, take 70g and add 140ml of deionized water (the amount of water is 200ml relative to 100g of roasted slag material), and carry out water immersion at 100°C and normal pressure for 20min , leaching and dissolving Na in the roasted slag 2 SiO 3and NaAlSiO 4 , to obtain a solid-liquid mixed water immersion product; where the solid is dissolved Na 2 SiO 3 and NaAlSiO 4 The remaining product after; the liquid is containing Na 2 SiO 3 and NaAlSiO 4 The solution;
[0091] (3) Under high-speed stirring state, get whole water immersion product 100g (convert to containing 70g of calcined slag material), add sodium carbonate solution ...
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