Method for producing sodalite pure phase with shale ash
A technology for oil shale ash and sodalite is applied in the field of production and preparation of inorganic functional materials, and can solve the problems of difficulty in obtaining a pure phase of zeolite molecular sieve, cumbersome process steps and high preparation cost, and achieve simple pretreatment, simple process, and high equipment. less demanding effects
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Embodiment 1
[0014] (1) Grind the oil shale ash and pass it through a 100-mesh sieve. Dry in an oven at 90°C for 24 hours.
[0015] The XRF elemental analysis results of its chemical composition are as follows:
[0016] chemical composition
SiO 2
al 2 o 3
Fe 2 o 3
CO 2
K 2 o
TiO 2
%%
73.8
19.3
2.2
2.2
0.8
0.6
[0017] (2) Mole ratio H 2 O / Na 2 O=5 Weigh sodium hydroxide and deionized water, mix them in a polyethylene bottle, and press NaOH 2 O / SiO 2 =3 Add oil shale ash and stir for 0.5h to mix well.
[0018] (3) The above reaction mixture was transferred to a stainless steel reaction kettle, sealed and then placed in a 180°C electric constant temperature drying oven for crystallization for 24 hours.
[0019] (4) Take out the reaction kettle, perform suction filtration after cooling, wash until pH = 7, and put it in an oven at 100° C. to dry to obtain sodalite crystal powder.
Embodiment 2
[0021] (1) Grind the oil shale ash and pass it through a 100-mesh sieve. Dry in an oven at 100°C for 24 hours.
[0022] (2) Mole ratio H 2 O / Na 2 O=7.8 Weigh sodium hydroxide and deionized water, mix them in a polyethylene bottle, and press Na 2 O / SiO 2 =7 Add oil shale ash and stir for 1 hour to mix well.
[0023] (3) The above reaction mixture was transferred to a stainless steel reaction kettle, sealed and placed in a 160°C electric constant temperature drying oven for crystallization for 70 hours.
[0024] (4) Take out the reaction kettle, perform suction filtration after cooling, wash until pH = 7, and put it in an oven at 100° C. to dry to obtain sodalite crystal powder.
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