A method for synthesizing beta zeolite by silicon germanium itq-17 zeolite
A beta zeolite and zeolite technology, which is applied in the field of synthesis of Beta zeolite from silicon germanium ITQ-17 zeolite, can solve the problems of exceeding the standard, prolonging the production cycle, energy consumption, etc., and achieve the effects of reducing manufacturing costs, improving catalytic activity, and avoiding demoulding
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Embodiment 1
[0032] Example 1: Synthesis of Beta molecular sieves at 120°C and 10% ITQ-17 seed crystal usage
[0033] The starting material molar ratio of Beta molecular sieve is as follows: 38.70SiO 2 / 1.00Al 2 o 3 / 14.40Na 2 O / 1354.83H 2 O, where NaOH / SiO 2 =0.72,H 2 O / SiO 2 =35.00. The specific operation is as follows: 0.356gNaAlO 2 and 1.56g NaOH were dissolved in 37.8mL water to form solution A; after complete dissolution, 3.60g white carbon black was added to solution A, and vigorously stirred for 10~30min to form gel state mixture B; then silicon germanium ITQ-17 Zeolite seed crystal 0.36g (accounting for SiO 2 10% of the mass, its XRD such as figure 1 (shown) was added to B, and stirred evenly to form a gel-state mixture C; C was transferred to a 100mL stainless steel reactor with a polytetrafluoroethylene liner, and hydrothermally crystallized at 120°C for 60h. After cooling, the product was filtered at room temperature and dried overnight at 80°C to obtain 1.13 g of th...
Embodiment 2
[0034] Example 2: Synthesis of Beta molecular sieves at 120°C with 3% ITQ-17 seed crystal usage
[0035] The starting material molar ratio of Beta molecular sieve is as follows: 38.70SiO 2 / 1.00Al 2 o 3 / 14.40Na 2 O / 1354.83H 2 O, where NaOH / SiO 2 =0.72,H 2 O / SiO 2 =35.00. The specific operation is as follows: 0.785gNaAlO 2 and 1.56g NaOH were dissolved in 37.8mL water to form solution A; after complete dissolution, 3.60g white carbon black was added to solution A, and vigorously stirred for 10~30min to form gel state mixture B; then silicon germanium ITQ-17 Zeolite seed crystal 0.108g (accounting for SiO 2 3% of the mass) was added to B, and stirred evenly to form a gel-state mixture C; transfer C to a 100mL stainless steel reactor with a polytetrafluoroethylene liner, and hydrothermally crystallize at 120°C for 120h . After cooling, the product was filtered at room temperature and dried overnight at 80°C to obtain 0.99 g of the product. Characterized by XRD, the pro...
Embodiment 3
[0036] Example 3: Synthesis of Beta molecular sieves at 130°C with 5% ITQ-17 seed crystal usage
[0037] The starting material molar ratio of Beta molecular sieve is as follows: 38.70SiO 2 / 1.00Al 2 o 3 / 13.00Na 2 O / 1354.83H 2 O, where NaOH / SiO 2 =0.67,H 2 O / SiO 2 =35.00. The specific operation is as follows: 0.785gNaAlO 2 and 1.44g NaOH were dissolved in 37.8mL water to form solution A; after complete dissolution, 3.60g white carbon black was added to solution A and stirred vigorously for 10-30min to form gel-state mixture B; then silicon germanium ITQ-17 Zeolite seed crystal 0.18g (accounting for SiO 2 5% of the mass) was added to B, and stirred evenly to form a gel-state mixture C; transfer C to a 100mL stainless steel reactor with a polytetrafluoroethylene liner, and hydrothermally crystallize at 130°C for 96h . After cooling, the product was filtered at room temperature and dried at 80°C overnight to obtain 1.04 g of the product. The product is identified as B...
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