Double micro pore high silicon composite molecular sieve and its preparing method
A molecular sieve and high-silicon technology, applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, etc., can solve the problems of difficult post-treatment process and poor hydrothermal stability, and achieve good thermal and hydrothermal stability Effect
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Embodiment approach 1
[0015] In the first step, mix 13.0g of high-silicon Y zeolite powder and 90.0ml of NaOH (0.10mol / L) evenly, stir with magnetic force for 1 hour, put the mixed solution into a 150ml stainless steel reaction kettle, and dissolve it in alkali at 180°C for 3 hours . Obtain a high-silicon Y zeolite whose crystallinity decreases after alkali dissolution;
[0016] In the second step, the obtained high-silicon Y zeolite whose crystallinity is reduced after alkali dissolution is centrifuged with a centrifuge, and the supernatant is removed;
[0017] The 3rd step adds 0.6g sodium hydroxide on the basis of the high silicon Y zeolite that crystallinity reduces after the alkali dissolution that makes, 10.0gTEABr (tetraethylammonium bromide), 10.0ml strong ammoniacal liquor, 28.0ml silica sol ( [SiO 2 ]=5.80mol / L), 16.0ml of distilled water were mixed and stirred into a uniform white jelly, put into a 150ml stainless steel reaction kettle, crystallized at 140°C for 6 days, taken out, wash...
Embodiment approach 2
[0019] In the first step, mix 13.0g of high-silicon Y zeolite powder and 90.0ml of NaOH (0.10mol / L) evenly, stir with magnetic force for 1 hour, put the mixed solution into a 150ml stainless steel reaction kettle, and dissolve it in alkali at 175°C for 4 hours . Obtain a high-silicon Y zeolite whose crystallinity decreases after alkali dissolution;
[0020] In the second step, the obtained high-silicon Y zeolite whose crystallinity is reduced after alkali dissolution is centrifuged with a centrifuge, and the supernatant is removed;
[0021] The 3rd step adds 0.4g sodium hydroxide on the basis of the high silicon Y zeolite that crystallinity reduces after the alkali dissolution that makes, 10.0gTEABr (tetraethylammonium bromide), 10.0ml strong ammoniacal liquor, 28.0ml silica sol ( [SiO 2 ]=5.80mol / L), 16.0ml of distilled water were mixed and stirred into a uniform white jelly, put into a 150ml stainless steel reaction kettle, crystallized at 140°C for 6 days, taken out, wash...
Embodiment approach 3
[0023] In the first step, mix 13.0g high-silicon Y zeolite powder and 90.0ml NaOH (0.10mol / L) evenly, stir with magnetic force for 1 hour, put the mixed solution into a 150ml stainless steel reaction kettle, and dissolve it in alkali at 140°C for 20 Hours. Obtain a high-silicon Y zeolite whose crystallinity decreases after alkali dissolution;
[0024] In the second step, the obtained high-silicon Y zeolite whose crystallinity is reduced after alkali dissolution is centrifuged with a centrifuge, and the supernatant is removed;
[0025] The 3rd step adds 0.8g sodium hydroxide on the basis of the high silicon Y zeolite that crystallinity reduces after the alkali dissolution that makes, 10.0gTEABr (tetraethylammonium bromide), 10.0ml strong ammoniacal liquor, 28.0ml silica sol ( [SiO 2 ]=5.80mol / L), 16.0ml of distilled water were mixed and stirred into a uniform white jelly, put into a 150ml stainless steel reaction kettle, crystallized at 140°C for 8 days, taken out, washed unt...
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