NaY molecular sieve modifying method
A molecular sieve and modification technology, which is applied in the direction of octahedral crystalline aluminum silicate zeolite and crystalline aluminosilicate zeolite, can solve the problems of destroying molecular sieve structure, increasing resin regeneration, and molecular sieve waste, so as to avoid environmental pollution and catalyze Effects of increased productivity and improved performance
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Embodiment 1
[0026] Take NaY molecular sieve (15g), add water (150ml) and add rare earth solution LaCl 3 (1.0ml), add acetic acid-sodium acetate buffer solution (60ml) and stir for 30min, add organic mixed acid (both molar ratio of formic acid+hydrochloric acid 18:1):Na 2 O=2.2:1, control the rate of acid addition, heat up to 90°C, adjust PH=5.4, mechanically stir for 60min, filter with suction, rinse with 150ml of water, dry to obtain a crude sample, add 500ml of water and 8g of starch to the crude sample, Stir for 30 minutes, filter with suction, place in a muffle furnace for roasting, the roasting temperature is 600 degrees, and roast for 2 hours to detect the crystallinity of the sample 75% and Na 2 The content of O is 0.98%.
Embodiment 2
[0028] Take NaY molecular sieve (15g), add water (300ml) and add rare earth solution LaCl 3 (1.0ml), add acetic acid-sodium acetate buffer solution (120ml) and stir for 30min, add organic mixed acid (both molar ratio of acetic acid+hydrochloric acid is 18:1):Na 2 The molar ratio of O=2.2:1, control the drop rate of acid, be warming up to 90 ℃, adjust PH=5.4, mechanically stir 60min, suction filtration, rinse with 150ml water, dry, obtain crude sample, take crude sample and add 500ml water and 8g starch, stirred for 30min, suction filtered, placed in a muffle furnace for roasting, the roasting temperature was 600 degrees, roasted for 2 hours to detect the crystallinity of the sample 80% and Na 2 The content of O is 0.7%.
Embodiment 3
[0030] Take NaY molecular sieve (15g), add water (150ml) and add rare earth solution LaCl 3 (1.0ml), add acetic acid-sodium acetate buffer solution (60ml) and stir for 30min, add organic mixed acid (both molar ratio of trichloroacetic acid+hydrochloric acid 18:1):Na 2O=2.2:1, control the rate of acid addition, heat up to 90°C, adjust pH=5.4, mechanically stir for 60min, filter with suction, rinse with 150ml of water, dry to obtain a crude sample, add 500ml of water and 8g of starch to the crude sample, Stir for 30 minutes, filter with suction, place in a muffle furnace and roast at a temperature of 600 degrees, and roast for 2 hours to detect the crystallinity of the sample at 81% and Na 2 The content of O is 0.88%.
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