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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[0014] Embodiment 1
[0015] In the first step, 13.0g of high-silicon Y zeolite powder and 90.0ml of NaOH (0.10mol / L) were mixed uniformly, stirred with magnetic stirring for 1 hour, and the mixed solution was loaded into a 150ml stainless steel reaction kettle, and dissolved in alkali at 180 ° C for 3 hours . Obtain high-silica Y zeolite with reduced crystallinity after alkali dissolution;
[0016] In the second step, the obtained high-silicon Y zeolite with reduced crystallinity after being dissolved in alkali is centrifuged with a centrifuge, and the supernatant is removed;
[0017] In the third step, 0.6g of sodium hydroxide, 10.0g of TEABr (tetraethylamine bromide), 10.0ml of concentrated ammonia, 28.0ml of silica sol ( [SiO 2 ]=5.80mol / L), 16.0ml of distilled water was mixed and stirred to form a uniform white jelly, loaded into a 150ml stainless steel reactor, crystallized at 140°C for 6 days, taken out, washed until the solution was neutral and then dried. The prep...
Example Embodiment
[0018] Embodiment 2
[0019] In the first step, 13.0g of high-silicon Y zeolite powder and 90.0ml of NaOH (0.10mol / L) were mixed uniformly, stirred for 1 hour with magnetic stirring, and the mixed solution was loaded into a 150ml stainless steel reaction kettle, and dissolved in alkali at 175 ° C for 4 hours . Obtain high-silica Y zeolite with reduced crystallinity after alkali dissolution;
[0020] In the second step, the obtained high-silicon Y zeolite with reduced crystallinity after being dissolved in alkali is centrifuged with a centrifuge, and the supernatant is removed;
[0021] In the third step, 0.4g sodium hydroxide, 10.0g TEABr (tetraethylamine bromide), 10.0ml concentrated ammonia water, 28.0ml silica sol ( [SiO 2 ]=5.80mol / L), 16.0ml of distilled water was mixed and stirred to form a uniform white jelly, loaded into a 150ml stainless steel reactor, crystallized at 140°C for 6 days, taken out, washed until the solution was neutral and then dried. The prepared s...
Example Embodiment
[0022] Embodiment 3
[0023] In the first step, 13.0g of high-silicon Y zeolite powder and 90.0ml of NaOH (0.10mol / L) were mixed uniformly, stirred with magnetic stirring for 1 hour, and the mixed solution was put into a 150ml stainless steel reaction kettle, and dissolved in alkali at 140 ° C for 20 Hours. Obtain high-silica Y zeolite with reduced crystallinity after alkali dissolution;
[0024] In the second step, the obtained high-silicon Y zeolite with reduced crystallinity after being dissolved in alkali is centrifuged with a centrifuge, and the supernatant is removed;
[0025] In the third step, 0.8g sodium hydroxide, 10.0g TEABr (tetraethylamine bromide), 10.0ml concentrated ammonia water, 28.0ml silica sol ( [SiO 2 ]=5.80mol / L), 16.0ml of distilled water was mixed and stirred to form a uniform white jelly, loaded into a 150ml stainless steel reactor, crystallized at 140°C for 8 days, taken out, washed until the solution was neutral and then dried. The prepared samp...
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