Method for preparing size-controllable NaY molecular sieve
A technology for controlling size and molecular sieve, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high production cost, complex process, pipeline blockage, etc., and achieve the effect of low cost and simple process
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Embodiment 1
[0022] Directing agent preparation
[0023] 854mL peralkaline sodium metaaluminate solution (Na 2 O content 278g / L, Al 2 o 3 Content 40.3g / L, specific gravity 1.326, product of Sinopec Catalyst Changling Branch) added to 1200mL water glass (SiO 2 Content 253.5g / L, modulus 3.25, specific gravity 1.256, product of Sinopec Catalyst Changling Branch), after mixing evenly, aging at room temperature for 24h to obtain the molar ratio Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=16:15:1:320 directing agent.
[0024] gelation process
[0025] In the gelling kettle, according to the synthetic molar ratio Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=2.70:8.4:1:209 (directing agent accounts for 5% of the aluminum source in the feed), first add water glass solution, heat up to 85-90°C, add directing agent under strong stirring conditions, stir for 5 minutes, and then Add sulfuric acid deionized water, aluminum sulfate and low-alkali sodium metaaluminate solution to the medium, keep the temperature at 85...
Embodiment 2
[0029] Directing agent preparation
[0030] 854mL peralkaline sodium metaaluminate solution (Na 2 O content 278g / L, Al 2 o 3 Content 40.3g / L, specific gravity 1.326, product of Sinopec Catalyst Changling Branch) added to 1200mL water glass (SiO 2 Content 253.5g / L, modulus 3.25, specific gravity 1.256, product of Sinopec Catalyst Changling Branch), after mixing evenly, aging at room temperature for 24h to obtain the molar ratio Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=16:15:1:320 directing agent.
[0031] gelation process
[0032] In the gelling kettle, according to the synthetic molar ratio Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=2.70:8.4:1:209 (directing agent accounts for 5% of the aluminum source in the feed), first add water glass solution, heat up to 25-30°C, add directing agent under strong stirring conditions, stir for 20 minutes, and then Add sulfuric acid deionized water, aluminum sulfate and low-alkali sodium metaaluminate solution to the medium, keep the temperature at 2...
Embodiment 3
[0036] Directing agent preparation
[0037] 854mL peralkaline sodium metaaluminate solution (Na 2 O content 278g / L, Al 2 o 3 Content 40.3g / L, specific gravity 1.326, product of Sinopec Catalyst Changling Branch) added to 1200mL water glass (SiO 2 Content 253.5g / L, modulus 3.25, specific gravity 1.256, product of Sinopec Catalyst Changling Branch), after mixing evenly, aging at room temperature for 24h to obtain the molar ratio Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=16:15:1:320 directing agent.
[0038] gelation process
[0039] In the gelling kettle, according to the synthetic molar ratio Na 2 O: SiO 2 :Al 2 o 3 :H 2 O=2.70:8.4:1:209 (directing agent accounts for 5% of the aluminum source in the feed), first add water glass solution, heat up to 55-60°C, add directing agent under strong stirring conditions, stir for 30 minutes, and then Add sulfuric acid deionized water, aluminum sulfate and low-alkali sodium metaaluminate solution to the medium, keep the temperature at 5...
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