Method used for preparing 4A molecular sieve by coal gangue alkaline leaching one-step method
A technology of coal gangue and molecular sieve, applied in chemical and industrial fields, can solve the problems of complex production process, high process cost and long reaction time, and achieve the effects of simple reaction operation, easy industrialization and short reaction time.
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Embodiment 1
[0020] Example 1. A 4A molecular sieve was synthesized by the aging process at 25° C. for 1 h and the crystallization process at 100° C. for 4 h.
[0021] Weigh 10g coal gangue activated powder, according to the amount ratio of each component of 4A molecular sieve: 2SiO 2 : A1 2 o 3 :Na 2 O: 50H 2 O Weigh 3.2g NaOH, 38g deionized water, mix well and age at 25°C for 1h; put the resulting mixture into a hydrothermal reaction kettle, crystallize at 100°C for 4h, after the crystallization reaction Filtration; the filter cake was washed with distilled water until pH = 8; and the 4A molecular sieve product was obtained after drying.
Embodiment 2
[0022] Example 2. A 4A molecular sieve was synthesized by the aging process at 25° C. for 1 h, and the crystallization process at 100° C. for 5 h.
[0023] Weigh 10g coal gangue activated powder, according to the amount ratio of each component of 4A molecular sieve: 2SiO 2 : A1 2 o 3 :Na 2 O: 50H 2 O Weigh 3.2g NaOH, 38g deionized water, mix well and age at 25°C for 1h; put the resulting mixture into a hydrothermal reaction kettle, crystallize at 100°C for 5h, and the crystallization reaction ends After filtering; the filter cake was washed with distilled water until pH = 8; after drying, the 4A molecular sieve product was obtained.
Embodiment 3
[0024] Example 3. A 4A molecular sieve was synthesized by the aging process at 25° C. for 1 h, and the crystallization process at 100° C. for 6 h.
[0025] Weigh 10g coal gangue activated powder, according to the amount ratio of each component of 4A molecular sieve: 2SiO 2 : A1 2 o 3 :Na 2 O: 50H 2 O Weigh 3.2g NaOH and 38g deionized water, mix well and age at 25°C for 1h; put the resulting mixture into a hydrothermal reaction kettle, crystallize at 100°C for 6h, and the crystallization reaction ends After filtering; the filter cake was washed with distilled water until pH = 8; after drying, the 4A molecular sieve product was obtained.
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