Method for synthesizing morphology-controllable SSZ-13 molecular sieves
A synthetic method and technology of molecular sieves, applied in the field of molecular sieves
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Embodiment 1
[0032] Such as figure 1 , Figure 5 Shown, a kind of synthetic method of controllable shape SSZ-13 molecular sieve, according to alkaline solution (with Na 2 O): Raw material aluminum (as Al 2 o 3 Calculated): Accelerator: Raw silicon (as SiO 2 Count): H 2 The molar ratio of O: template agent is 12:3:3:110:4500:20 to prepare the reaction liquid. Take a certain amount of 3%wt NaOH solution, 25%wt N,N,N-trimethyl-1-adamantyl ammonium hydroxide and water into the beaker, stir evenly; then add pseudo-boehmite and triethanolamine , stirred for 3 hours; then added silica sol, stirred for 1 hour; the reaction solution was put into a high-pressure reactor, and hydrothermally crystallized at 160° C. for 4 days. Then filter and wash until the filtrate is neutral, dry at 140°C for 4 hours, and roast at 550°C for 6 hours to obtain SSZ-13 molecular sieve. XRD shows SSZ-13 molecular sieve (see figure 1 ), SEM showed regular cubic morphology crystals (see Figure 5 , A).
Embodiment 2
[0034] Such as figure 2 , Figure 5 Shown, a kind of synthetic method of controllable shape SSZ-13 molecular sieve, according to alkaline solution (with Na 2 O): Raw material aluminum (as Al 2 o 3 Calculated): Accelerator: Raw silicon (as SiO 2 Count): H 2 The molar ratio of O: template agent is 15:2:4:100:3500:15 to prepare the reaction solution. Take a certain amount of 20%wt NaOH solution, 25% N,N,N-trimethyl-1-adamantyl ammonium hydroxide and water into the beaker, stir evenly; then add pseudo-boehmite and tetraethylene penta Amine, stirred for 3 hours; white carbon black was added, stirred for 2 hours; the reaction solution was put into a high-pressure reactor, and hydrothermally crystallized at 180°C for 4 days. Then filter and wash until the filtrate is neutral, dry at 140°C for 4 hours, and roast at 550°C for 6 hours to obtain SSZ-13 molecular sieve. XRD shows SSZ-13 molecular sieve (see figure 2 ), SEM showed multi-folded cubic-like crystals (see Figure 5 ...
Embodiment 3
[0036] Such as image 3 , Figure 5 Shown, a kind of synthetic method of controllable shape SSZ-13 molecular sieve, according to alkaline solution (with Na 2 O): Raw material aluminum (as Al 2 o 3 Calculated): Accelerator: Raw silicon (as SiO 2 Count): H 2 The molar ratio of O: template agent is 10:3:3:110:4500:20 to prepare the reaction liquid. Take a certain amount of 3%wt NaOH solution, 25% N,N,N-trimethyl-1-adamantyl ammonium hydroxide and water into the beaker, stir evenly; then add sodium metaaluminate and cysteine acid, and stirred for 1 hour; then added white carbon black, and stirred for 2 hours; the reaction liquid was put into a high-pressure reactor, and hydrothermally crystallized at 160° C. for 4 days. Then filter and wash until the filtrate is neutral, dry at 140°C for 4 hours, and roast at 550°C for 6 hours to obtain SSZ-13 molecular sieve. XRD shows SSZ-13 molecular sieve (see image 3 ), SEM showed spherical crystals (see Figure 5 , C).
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