Synthetic method for MCM-22 molecular sieve
A synthetic method and technology of molecular sieves, applied in molecular sieves and base exchange compounds, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as large radius and difficulties
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Embodiment 1
[0027] The MCM-22 molecular sieve provided by the present invention is prepared by using silica gel as a silicon source, and hexamethyleneimine (HMI) and butylamine (BuA, with a purity of 99%) as templates.
[0028] Change the templating agent in comparative example 1 to 1.58 grams of HMI and 1.17 grams of butylamine (BuA), so that (HMI+BuA) / SiO 2 =0.35, BuA / HMI=1, and the composition of other raw materials remained unchanged. The crystallization temperature and time are 160° C. and 84 h, respectively, and the product is MCM-22 molecular sieve with a relative crystallinity of 86%.
Embodiment 2
[0030] The MCM-22 molecular sieve provided by the present invention was prepared by using silica gel as a silicon source, hexamethyleneimine (HMI) and cyclohexylamine (CHA, with a purity of 98%, the same below) as templates.
[0031] Change the templating agent in comparative example 1 to 1.58 gram HMI and 1.58 gram (CHA), make (HMI+BuA) / SiO 2 =0.35, CHA / HMI=1, and the composition of other raw materials remained unchanged. The crystallization temperature and time were 160° C. and 84 h, respectively, and the product was MCM-22 molecular sieve with a relative crystallinity of 91%.
Embodiment 3
[0033] The MCM-22 molecular sieve provided by the invention is prepared by using silica gel as a silicon source, hexamethyleneimine (HMI) and cyclohexylamine (CHA) as a template.
[0034] Change the templating agent in comparative example 1 to 1.06g HMI and 2.10g CHA, make (HM+CHA) / SiO 2 =0.35, CHA / HMI=2, and the composition of other raw materials remained unchanged. The crystallization temperature and time are 160° C. and 100 h, respectively, and the product is MCM-22 molecular sieve with a relative crystallinity of 100%.
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