Synthesis of SEW skeleton type aluminiferous molecular sieve
A framework-type, molecular sieve technology, used in molecular sieves and alkali exchange compounds, molecular sieve catalysts, crystalline aluminosilicate zeolites, etc., can solve problems such as inability to catalyze and weak acid strength
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Embodiment 1
[0044] The following components were sequentially added to the Teflon liner: 22.96 g deionized water, 2.64 g 1M NaOH solution, 4.38 g 12.6% 1,6-bis(N-cyclohexylpyrrolidinium) hexane hydroxide solution , 0.8g CBV 720Y-zeolite powder (Zeolyst International; SiO 2 / Al 2 o 3 molar ratio = 30) and 0.08 g SSZ-82 seed crystals. The reaction mixture has the following composition in terms of molar ratios:
[0045] SiO 2 :0.033Al 2 o 3 :0.2NaOH:40H 2 o
[0046] The liner was then capped and sealed inside the Parr steel autoclave reactor. The autoclave was then placed in an oven and heated at 160 °C for 35 days with tumbling at 43 rpm. The solid product was recovered from the cooled reactor by centrifugation, washed with deionized water and dried at 95°C.
[0047] The powder XRD pattern of the resulting product is provided at figure 1 Middle (upper panel) and consistent with the product being a pure SSZ-82 molecular sieve.
[0048] As determined by inductively coupled plasma ...
Embodiment 2
[0050] Example 1 was repeated except that CBV 760Y-zeolite powder (Zeolyst International; SiO 2 / Al 2 o 3 molar ratio = 60) instead of CBV 720Y-zeolite powder. The reaction mixture has the following composition in terms of molar ratios:
[0051] SiO 2 :0.0167Al 2 o 3 :0.2NaOH:40H 2 o
[0052] The reaction mixture contains seeds of SSZ-82, seeds / SiO 2 The weight ratio is 0.1. The liner was then capped and sealed inside the Parr steel autoclave reactor. The autoclave was then placed in an oven and heated at 160 °C for 7 days with tumbling at 43 rpm. The solid product was recovered from the cooled reactor by centrifugation, washed with deionized water and dried at 95°C.
[0053] The powder XRD pattern of the resulting product is provided at figure 1 Middle (lower panel) and consistent with the product being a pure SSZ-82 molecular sieve.
[0054] As determined by ICP elemental analysis, the SiO of the product 2 / Al 2 o 3 The molar ratio was 48.
Embodiment 3
[0055] Embodiment 3 (comparative example)
[0056] Example 1 was repeated except that no seeds were added to the reaction mixture.
[0057] Analysis of the product by powder XRD showed that the product was a phase different from SSZ-82.
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