Preparation method of micron-sized HZSM-5 molecular sieve and application of micron-sized HZSM-5 molecular sieve
A molecular sieve, micron-scale technology, applied in molecular sieve catalysts, chemical instruments and methods, hydrocarbon production from halogen-containing organic compounds, etc., can solve the problems such as the inconspicuous advantage of xylene diffusion, achieve simple and easy preparation process, and improve para-position Selectivity, catalytic activity and selective effect
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Embodiment 1
[0028] According to the molar ratio of material SiO 2 :Al 2 o 3 :TPAOH:TEA:NaOH:H 2 The ratio of O=100:0.67:30:10:16.5:3800, with 20.03g silica sol (30wt.%), 0.446g aluminum sulfate, 24.402g tetrapropyl ammonium hydroxide (25wt.%), 1.012g triethyl Amine, 0.660g sodium hydroxide and water, mix well, statically crystallize at 180°C for 24h, cool, centrifuge, wash with water until neutral, dry overnight, then place in a muffle furnace and gradually raise the temperature to 550°C, and roast for 5h to obtain Molecular sieve Na-ZSM-5; ion exchange with 1mol / L ammonium nitrate solution at 80°C for 3h, repeat once, wash with water, dry overnight, put in a muffle furnace and gradually raise the temperature to 550°C, and roast for 5h to obtain Si / Al =75 HZSM-5 molecular sieve A.
[0029] Molecular sieve catalyzed methyl bromide toluene to prepare p-xylene reaction is carried out in a miniature fixed bed quartz reactor, take 1g of the above catalyst, nitrogen carrier gas flow rate 10...
Embodiment 2
[0031] According to the molar ratio of material SiO 2 :Al 2 o 3 :TPAOH:TEA:NaOH:H 2 The ratio of O=100:0.67:20:20:16.5:3800, with 20.03g silica sol (30wt.%), 0.446g aluminum sulfate, 16.268g tetrapropyl ammonium hydroxide (25wt.%), 2.024g triethyl Amine, 0.660g sodium hydroxide and water, mix well, statically crystallize at 180°C for 24h, cool, centrifuge, wash with water until neutral, dry overnight, then place in a muffle furnace and gradually raise the temperature to 550°C, and roast for 5h to obtain Molecular sieve Na-ZSM-5; ion exchange with 1mol / L ammonium nitrate solution at 80°C for 3h, repeat once, wash with water, dry overnight, put in a muffle furnace and gradually raise the temperature to 550°C, and roast for 5h to obtain Si / Al =75 HZSM-5 Molecular Sieve B.
[0032] Molecular sieve catalyzed methyl bromide toluene to prepare p-xylene reaction is carried out in a miniature fixed bed quartz reactor, take 1g of the above catalyst, nitrogen carrier gas flow rate 10...
Embodiment 3
[0034] According to the molar ratio of material SiO 2 :Al 2 o 3 :TPAOH:TEA:NaOH:H 2 The ratio of O=100:0.67:10:30:16.5:3800, with 20.03g silica sol (30wt.%), 0.446g aluminum sulfate, 8.134g tetrapropyl ammonium hydroxide (25wt.%), 3.036g triethyl Amine, 0.660g sodium hydroxide and water, mix well, statically crystallize at 180°C for 24h, cool, centrifuge, wash with water until neutral, dry overnight, then place in a muffle furnace and gradually raise the temperature to 550°C, and roast for 5h to obtain Molecular sieve Na-ZSM-5; ion exchange with 1mol / L ammonium nitrate solution at 80°C for 3h, repeat once, wash with water, dry overnight, put in a muffle furnace and gradually raise the temperature to 550°C, and roast for 5h to obtain Si / Al =75 HZSM-5 molecular sieve C.
[0035] Molecular sieve catalyzed methyl bromide toluene to prepare p-xylene reaction is carried out in a miniature fixed bed quartz reactor, take 1g of the above catalyst, nitrogen carrier gas flow rate 10m...
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