Preparation method of shape-selective isomerization catalyst based on AEL type structure molecular sieve
A technology of molecular sieves and catalysts, which is applied in the field of preparation of shape-selective heterogeneous catalysts, can solve the problems of target product selectivity and yield reduction, achieve high activity and isomer yields, improve mass transfer, and shorten the channel depth.
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Embodiment 1
[0038] Get 120g of SAPO-11 molecular sieve former powder (same as the comparative example, Si content is 0.6wt.%) containing di-n-propylamine template (content is 10wt.% of molecular sieve weight), 320 ℃ of roasting 12h under nitrogen atmosphere, obtain about 105g SAPO-11 molecular sieve carrier whose micropore channels are partially filled with carbon deposits. The molecular sieve supports a volume carbon content of 5.0wt.%, and a micropore volume of 0.016cm 3 / g. With 5mL of H containing Pt 0.05g / mL 2 PtCl 6 The solution was impregnated with 50g of the above-mentioned carrier, and dried naturally at 120°C for 4h, at 400°C, the flow rate of hydrogen was controlled at 5mL / min / g 催化剂 , Reduction 8h, prepared 0.5wt.% Pt / SAPO-11 catalyst. The carbon content in the catalyst is 5.0wt.%, and the micropore volume is 0.016cm 3 / g. The characterization results of catalyst carbon deposition and micropore volume are shown in Table 1, and the evaluation results of catalytic reaction a...
Embodiment 2
[0040] Take 120g of MgAPO-11 molecular sieve powder (Mg content is 0.05wt.%) containing di-n-propylamine template (content is 12wt.% of the molecular sieve weight), and roast it under nitrogen atmosphere at 350°C for 8h to obtain about 105g microporous sieve coating. MgAPO-11 molecular sieve carrier filled with carbon deposits, the molecular sieve has a carbon content of 4.8wt.% and a micropore volume of 0.017cm 3 / g. With 5mL of H containing Pt 0.05g / mL 2 PtCl 6 The solution was impregnated with 50g of the above-mentioned carrier, dried naturally at 120°C for 4h, and at 350°C, the flow rate of hydrogen was controlled at 10mL / min / g 催化剂 , Reduction 6h, prepared 0.5wt.% Pt / MgAPO-11 catalyst. The carbon content in the catalyst is 0, and the micropore volume is 0.017cm 3 / g. The characterization results of catalyst carbon deposition and micropore volume are shown in Table 1, and the evaluation results of catalytic reaction are shown in Table 2.
Embodiment 3
[0042] Get 120g of ZnAPO-11 molecular sieve powder (Zn content is 1wt.%) containing diisopropylamine template (content is 20wt.% of the molecular sieve weight), roasted at 360°C for 6h under an argon atmosphere to obtain about 105g microporous sieve coating ZnAPO-11 molecular sieve carrier filled with carbon deposits, the molecular sieve has a volume carbon content of 4.0wt.%, and a micropore volume of 0.022cm 3 / g. With 5mL of H containing Pt 0.05g / mL 2 PtCl 6 The solution was impregnated with 50g of the above-mentioned carrier, and dried naturally at 120°C for 4h. At 300°C, the hydrogen flow rate was controlled at 20mL / min / g 催化剂 , Reduction for 4h, prepared 0.5wt.% Pt / ZnAPO-11 catalyst. The carbon content in the catalyst is 4.0wt.%, and the micropore volume is 0.022cm 3 / g. The characterization results of catalyst carbon content and micropore volume are shown in Table 1, and the evaluation results of catalytic reaction are shown in Table 2.
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