Process for the production of ethylene from ethanol
A technology of ethanol and ethylene, which is applied in the production of bulk chemicals, chemical instruments and methods, molecular sieve catalysts, etc., can solve the problems of low catalyst activity, achieve the effects of lowering the reaction temperature, good technical effects, and energy consumption reduction
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Embodiment 1
[0023] After dissolving 5 grams of CTMAB in 191 grams of deionized water and stirring to dissolve, add 55 grams of absolute ethanol, stir for 0.5 hours, then add 25 milliliters of ammonia water with a concentration of 26w%, stir for 0.5 hours, and then add 10 milliliters of ethyl orthosilicate , stirred at room temperature for 0.5 hours, then added 10 g of boehmite, stirred for 5 hours, crystallized at room temperature for 2 days, filtered, dried at 120°C, and calcined at 550°C for 5 hours to obtain catalyst A. MCM-48 parts by weight in the catalyst is 28 parts, Al 2 o 3 The parts by weight are 72 parts.
[0024] The performance evaluation of the catalyst was carried out in a fixed-bed tubular reactor (Ф25×500 mm stainless steel), with a catalyst loading of 10 ml. The reaction products were analyzed separately after gas-liquid separation. The reaction conditions and reaction results are shown in Table 1.
Embodiment 2
[0026] Dissolve 5 grams of CTMAB in 190 grams of deionized water and stir to dissolve, add 70 grams of 95% ethanol, stir for 0.5 hours, then add 40 milliliters of ammonia water with a concentration of 26w%, stir for 0.5 hours, then add 15 milliliters of methyl orthosilicate , stirred at room temperature for 0.5 hour, then added 30 g of boehmite, stirred for 5 hours, crystallized at 50°C for 2 days, filtered, dried at 120°C, and calcined at 550°C for 5 hours to obtain catalyst B. MCM-48 parts by weight in the catalyst is 17 parts, Al 2 o 3 The parts by weight are 83 parts.
[0027] The performance evaluation of the catalyst was carried out in a fixed-bed tubular reactor (Ф25×500 mm stainless steel), with a catalyst loading of 10 ml. The reaction products were analyzed separately after gas-liquid separation. The reaction conditions and reaction results are shown in Table 1.
Embodiment 3
[0029] After dissolving 5 grams of CTMAB in 190 grams of deionized water and stirring to dissolve, add 70 grams of absolute ethanol, stir for 0.5 hours, then add 40 milliliters of ammonia water with a concentration of 26w%, stir for 0.5 hours, then add 15 grams of silica sol, and Stir for 0.5 hour, then add 300 g of boehmite, stir for 5 hours, crystallize at 100°C for 4 days, filter, dry at 120°C, and roast at 550°C for 5 hours to obtain catalyst C. MCM-48 parts by weight in the catalyst is 2.8 parts, Al 2 o 3 The parts by weight are 97.2 parts.
[0030] The performance evaluation of the catalyst was carried out in a fixed-bed tubular reactor (Ф25×500 mm stainless steel), with a catalyst loading of 10 ml. The reaction products were analyzed separately after gas-liquid separation. The reaction conditions and reaction results are shown in Table 1.
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