Catalyst for dehydrogenation of propane for preparing propylene and preparation method thereof
A propane dehydrogenation and catalyst technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor catalytic reaction stability, easy coke deactivation of catalysts, and short service life of catalysts. The effect of improving the anti-coking ability, excellent catalytic performance and excellent anti-coking performance
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[0021] Example 1
[0022] Sn-SBA-15 (Sn content 1.0 wt%) containing Sn in the skeleton was prepared by a hydrothermal synthesis method. Drying at 60~150℃ for 3~12h, 500~650℃ roasting for 3~8h, then stirring at room temperature in 5wt% aluminum isopropoxide in n-hexane solution for 6~12h, suction filtration, washing with n-hexane, 60~ Drying at 150°C for 3-12 hours, calcining at 500-650°C for 3-8 hours, and cooling to obtain AlSn-SBA-15 molecular sieve carrier (Al content is 2.2 wt%).
[0023] The AlSn-SBA-15 molecular sieve carrier was immersed in NaCl aqueous solution for 2-8h at 60-100℃, dried at 120℃ for 3-5h, and then at 60-100℃, the carrier was immersed in H 2 PtCl 6 Water solution for 2~8h, after drying at 60~150℃ for 3~24h, add 20wt% Al 2 O 3 Binder and 1~15wt% Sesbania powder, and 1~10wt% dilute HNO 3 Aqueous solution, extrusion molding.
[0024] Then dry at 60~150℃ for 2~24h, roast at 400~600℃ in air for 3~10h, reduce in hydrogen at 400~600℃ for 2~10h to obtain AlSn-SBA-15 ...
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[0027] Example 2
[0028] Sn-SBA-15 (Sn content 0.3 wt%) containing Sn in the skeleton was prepared by a hydrothermal synthesis method. Drying at 60~150℃ for 3~12h, 500~650℃ roasting for 3~8h, then stirring at room temperature in 1wt% aluminum isopropoxide in n-hexane solution for 6~12h, suction filtration, washing with n-hexane, 60~ Drying at 150°C for 3-12 hours, calcining at 500-650°C for 3-8 hours, and cooling to obtain AlSn-SBA-15 molecular sieve carrier (Al content is 0.4 wt%).
[0029] Immerse AlSn-SBA-15 molecular sieve support into MgCl at 60~100℃ 2 Aqueous solution for 2~8h, after drying at 120℃ for 3~5h, at 60~100℃, impregnate the above carrier into H 2 PtCl 6 And SnCl 4 The mixed solution of 2~8h, after drying at 60~150℃ for 3~24h, add 20wt% Al 2 O 3 Binder and 1~15wt% Sesbania powder, and 1~10wt% dilute HNO 3 Aqueous solution, extrusion molding.
[0030] Then dry at 60~150℃ for 2~24h, roast at 400~600℃ in air for 3~10h, reduce in hydrogen at 400~600℃ for 2~10h to obtain...
Example Embodiment
[0033] Example 3
[0034] Sn-SBA-15 (Sn content of 1.2 wt%) containing Sn in the skeleton was prepared by a hydrothermal synthesis method. Drying at 60~150℃ for 3~12h, 500~650℃ roasting for 3~8h, then stirring in 8wt% aluminum isopropoxide in n-hexane solution at room temperature for 6~12h, suction filtration, washing with n-hexane, 60~ Drying at 150°C for 3-12 hours, calcining at 500-650°C for 3-8 hours, and cooling to obtain AlSn-SBA-15 molecular sieve carrier (Al content is 4.5 wt%).
[0035] The AlSn-SBA-15 molecular sieve carrier was immersed in a mixed aqueous solution of NaCl and KCl for 2-8h at 60~100℃, dried at 120℃ for 3~5h, and then at 60~100℃, the carrier was immersed in H 2 PtCl 6 And SnCl 4 The mixed solution of 2~8h, after drying at 60~150℃ for 3~24h, add 20wt% Al 2 O 3 Binder and 1~15wt% Sesbania powder, and 1~10wt% dilute HNO 3 Aqueous solution, extrusion molding.
[0036] Then dry at 60~150℃ for 2~24h, calcine at 400~600℃ in air for 3~10h, and reduce in hydrogen at...
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