A kind of spherical zsm-5 zeolite molecular sieve and its preparation and application
A technology of ZSM-5 and zeolite molecular sieve, which is applied in the direction of crystalline aluminosilicate zeolite, borocarbane silicone crystalline aluminosilicate zeolite, etc., which can solve the problems of insufficient mechanical strength, excessive grain size, and high production cost.
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Embodiment 1
[0017] This example is used to illustrate the preparation method of ZSM-5 molecular sieve.
[0018] The specific steps are, the silicon source is SiO 2 Al 2 o 3 Meter, templating agent TPA + In terms of potassium salt in K and water in terms of SiO 2 :Al 2 o 3 :TPA + :K:Water=1:0.05:0.33:0.9 molar ratio mixed evenly, after aging at room temperature, moved to stainless steel crystallization kettle, crystallized at 170°C for 1 day, took out and washed, dried at 100°C for 6 hours, and then dried at 550°C Calcined for 6 hours to obtain product Z1. XRD spectrum of Z1 figure 1 It can be seen that Z1 is a ZSM-5 molecular sieve. SEM of Z1 figure 2 It is known that Z1 is spherical with a diameter of about 20 μm. Determination of the relative crystallinity of the product Z1 is listed in Table 1. BETs are listed in Table 1.
Embodiment 2
[0020] This example is used to illustrate the preparation method of ZSM-5 molecular sieve.
[0021] SiO 2 Al 2 o 3 Meter, templating agent TPA + In terms of potassium salt in K and water in terms of SiO 2 :Al 2 o 3 :TPA + :K:Water=1:0.05:0.33:0.9 molar ratio mixed evenly, after aging at room temperature, moved to stainless steel crystallization kettle, crystallized at 170°C for 1 day, took out and washed, dried at 100°C for 6 hours, and then dried at 550°C Calcined for 6 hours to obtain product Z2. The XRD spectrum of Z2 shows that Z2 is a ZSM-5 molecular sieve. According to the SEM of Z2, Z2 is spherical with a diameter of about 30 μm. Determination of the relative crystallinity of this product Z2 is listed in Table 1. BETs are listed in Table 1.
Embodiment 3
[0023] This example is used to illustrate the preparation method of ZSM-5 molecular sieve.
[0024] SiO 2 Al 2 o 3 Meter, templating agent TPA + In terms of potassium salt in K and water in terms of SiO 2 :Al 2 o 3 :TPA + :K:Water=1:0.05:0.33:0.9 molar ratio mixed evenly, after aging at room temperature, moved to stainless steel crystallization kettle, crystallized at 170°C for 1 day, took out and washed, dried at 100°C for 6 hours, and then dried at 550°C Calcined for 6 hours to obtain product Z3. The XRD spectrum of Z3 shows that Z3 is a ZSM-5 molecular sieve. According to the SEM of Z3, Z3 is spherical with a diameter of about 30 μm. Determination of the relative crystallinity of this product Z3 is listed in Table 1. BETs are listed in Table 1.
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