Erionite and method for preparing T-type zeolite of high content of erionite
A high erionite and erionite technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of lack of detailed synthetic raw materials and experimental conditions, and unpublished characterization results.
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Embodiment 1
[0031] Add the aluminum source into an appropriate amount of mixed lye of sodium hydroxide and potassium hydroxide, dissolve under the condition of heating and stirring, and dilute with the required water after the dissolution is complete. The silicon source is added with stirring to form a homogeneous and stable sol. The ratio of the sol is calculated according to the molar ratio of oxides: 1SiO 2 : 0.05Al 2 o 3 : 0.232Na 2 O: 0.078K 2 O: 10H 2 The O sols were aged at 45°C for 24 hours. The aged sol was poured into a closed stainless steel reaction kettle, and placed in an oven at 100°C for 120 hours to react. After the reaction was completed, the solid-liquid phase of the reactant was clearly separated. The reaction product was separated by suction filtration, washed repeatedly with deionized water until the pH value was neutral, and dried at 110° C. for 12 hours.
[0032]Figure 1 is the XRD diffraction pattern of the synthesized crystal. The synthesized zeolite cry...
Embodiment 2
[0035] The synthesis process is as shown in Example 1, except that the aging condition is changed to: aging at 30° C. for 24 hours. The reaction product was separated by suction filtration, washed repeatedly with deionized water until the pH value was neutral, and dried at 110° C. for 12 hours.
[0036] Figure 3 is the XRD diffraction pattern of the synthesized crystal. Analysis of the data in the figure shows that the synthesized crystal has the 'odd l line' characteristic peak of erionite, I 101 / I 100 = 33.5%. For pure erionite crystals.
[0037] Figure 4 shows the SEM morphology of the synthesized erionite. It can be seen from the figure that the synthesized T-type zeolite is disc-shaped and rod-shaped, and the disc-shaped crystals grow with the outer surface of the rod-shaped crystals as the center, and the size is about 4 μm.
Embodiment 3
[0039] The synthesis process is as shown in Example 1, the difference is that the sol ratio is adjusted to: 1SiO 2 : 0.05Al 2 o 3 : 0.232Na 2 O: 0.078K 2 O:14H 2 O. The reaction product was separated by suction filtration, washed repeatedly with deionized water until the pH value was neutral, and dried at 110° C. for 12 hours.
[0040] Synthetic crystals are characterized by XRD and SEM as pure erionite, I 101 / I 100 = 28.3%.
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