Synthesis method for ZSM-5 zeolite
A synthesis method, the technology of ZSM-5, is applied in the directions of crystalline aluminosilicate zeolite, borane silicone crystalline aluminosilicate zeolite, etc. Synthesis cost, effect of good reaction performance
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[0013] Example 1
[0014] This example illustrates the treatment process of the silicon by-product of a zirconium refinery used as a raw material for zeolite synthesis.
[0015] The silicon by-product (taken from Jiangxi Jinan Company) was slurried with 5 times 60°C water for 10 minutes, filtered, and rinsed with 5 times room temperature water. The filter cake was dried at 120°C for 5 hours to obtain synthetic ZSM- 5 Raw materials used for zeolite. Analysis shows that its SiO 2 The content is 94% by weight.
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[0017] Example 2
[0018] Dissolve 0.56 g NaOH in 28 g deionized water, add 1.34 g Al under stirring 2 (SO 4 ) 3 ·18H 2 O and 1.46 g of n-butylamine, and then 11.5 g of the silicon by-product treated in Example 1, the molar ratio of the obtained reaction mixture is: SiO 2 / Al 2 O 3 = 100, H 2 O / SiO 2 =7.8, Na 2 O / SiO 2 =0.05, n-butylamine / SiO 2 = 0.1. The mixture was placed in a stainless steel sealed reactor and crystallized at 170°C for 24 hours. After cooling, the product was filtered, washed, and dried. After XRD detection, the obtained zeolite is ZSM-5, and its relative crystallinity is 84%. The sample SiO 2 / Al 2 O 3 =80.
Example Embodiment
[0019] Example 3
[0020] Dissolve 1.92 g NaOH in 28 g deionized water, add 2.66 g Al under stirring 2 (SO 4 ) 3 ·18H 2 O and 1.02 g of n-butylamine, and then 11.5 g of the silicon by-product treated in Example 1, the molar ratio of the obtained reaction mixture is: SiO 2 / Al 2 O 3 =50, H 2 O / SiO 2 =7.8, Na 2 O / SiO 2 =0.06, n-butylamine / SiO 2 = 0.07. The mixture was placed in a stainless steel sealed reactor and crystallized at 175°C for 20 hours. After cooling, the product was filtered, washed, and dried. According to XRD detection, the obtained zeolite is ZSM-5, and its relative crystallinity is 96%. The sample SiO 2 / Al 2 O 3 = 40.
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