Method for producing ethane by catalyzing ethanol dehydration
A technology for catalytic dehydration and ethanol, which is applied in the production of bulk chemicals, chemical instruments and methods, molecular sieve catalysts, etc., and can solve problems such as poor catalyst stability
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Embodiment 1
[0023] By 1SiO 2 : 0.01Al2 o 3 : 0.41TEAOH: 0.31 acetylacetone: 31.76H 2 O Weigh each material, dissolve sodium aluminate in distilled water, add tetraethylammonium hydroxide dropwise, stir for 1 hour, then add ethyl orthosilicate dropwise, stir for 1 hour, then add acetylacetone, stir for 1 hour , adjusted to pH = 13.0 with 0.1N sodium hydroxide solution, and continued to stir for 5 hours. The resulting mixture was crystallized under hydrothermal conditions at 170°C for 4 days, washed, filtered and dried. The XRD spectrum of the obtained product is shown in figure 2 In curve 1, the relative intensity of (020), (040), (060) and (080) peaks in the diffraction spectrum is significantly increased, which shows that the synthesized product grows preferentially in the (010) direction (b-axis).
[0024] The synthesized raw ZSM-5 zeolite powder was treated with 0.8 mol / L acetic acid at 70°C for 5 hours for 4 consecutive times, wherein the weight ratio of the acid solution to the Z...
Embodiment 2
[0027] By 1SiO 2 : 0.01Al 2 o 3 : 0.25TPAOH : 0.05 sodium oxalate : 32.0H 2 O Weigh each material, dissolve sodium aluminate in distilled water, add tetrapropylammonium hydroxide dropwise, stir for 1 hour, then add silica sol dropwise, stir for 1 hour, then add sodium oxalate, stir for 1 hour, use 0.1 N sodium hydroxide solution was used to adjust the pH to 12.0, and stirring was continued for another 5 hours. The resulting mixture was crystallized under hydrothermal conditions at 200°C for 3 days, washed, filtered and dried. XRD spectrum see figure 2 In curve 2, the relative intensity of (020), (040), (060) and (080) peaks in the diffraction spectrum is significantly increased, which shows that the synthesized product grows preferentially in the (010) direction (b-axis). The synthesized raw ZSM-5 zeolite powder was treated with 0.8 mol / L acetic acid at 70°C for 5 hours for 4 consecutive times, wherein the weight ratio of the acid solution to the ZSM-5 zeolite was 9 to o...
Embodiment 3
[0030] By 1SiO 2 : 0.02Al 2 o 3 : 0.23TEAOH: 0.278-hydroxyquinoline: 44.64H 2 O Weigh each material, dissolve aluminum triethoxide in distilled water, add tetraethylammonium hydroxide dropwise, stir for 1 hour, then add silica sol dropwise, stir for 1 hour, then add 8-hydroxyquinoline, stir for 1 hour , adjust pH=11.0 with 0.1N sodium hydroxide solution, and continue stirring for 5 hours. The resulting mixture was crystallized under hydrothermal conditions at 150°C for 6 days, washed, filtered and dried. XRD spectrum see figure 2 In curve 3, the relative intensity of (020), (040), (060) and (080) peaks in the diffraction spectrum is significantly increased, which shows that the synthesized product grows preferentially in the (010) direction (b-axis). The synthesized raw ZSM-5 zeolite powder was treated with 0.8 mol / L acetic acid at 80°C for 5 hours for 3 consecutive times, wherein the weight ratio of the acid solution to the ZSM-5 zeolite was 8 to obtain HZSM-5.
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