Improved diesel hydrocracking catalyst and preparing method thereof
A hydrocracking and catalyst technology is applied in the field of an improved diesel hydrocracking catalyst and its preparation, which can solve the problems of general middle distillate product quality and low catalytic activity of the catalyst, achieve high selectivity and avoid secondary side reactions , the effect of good middle distillate selectivity
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[0034] Example 1
[0035] Weigh 201.3g tetraethylammonium bromide (98wt%, technical grade), 27.39g sodium hydroxide, 7.2g pseudo-boehmite (70wt%, technical grade), 870g of water, mix and stir until a clear solution, and then Add 180g of white carbon black (98wt%, industrial grade) to the solution under constant stirring, and continue to stir to obtain a uniform silica-alumina gel; the silica-alumina gel is dynamically crystallized at 145°C for 7 days, and the solid-liquid separation After washing and drying, a β molecular sieve was obtained, numbered B1. The main properties of the β molecular sieve are shown in Table 1.
[0036] Add 3000ml aluminum chloride solution (concentration 1.5mol / L) into a 5000ml beaker, add 19g B1 molecular sieve (99% dry basis) into the mixed solution, keep the temperature at 70℃, and continuously add 2mol / L ammonia until the pH is 4 , Evaporate at 85°C, dry the sucked white solid at 100°C for 3 hours, and calcinate at 500°C for 4 hours to obtain 273.7g ...
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[0038] Example 2
[0039] Weigh 201.3g tetraethylammonium bromide (98wt%, technical grade), 27.39g sodium hydroxide, 7.2g pseudo-boehmite (70wt%, technical grade), 870g of water, mix and stir until a clear solution, and then Add 180g of white carbon black (98wt%, industrial grade) to the solution under constant stirring, and continue to stir to obtain a uniform silica-alumina gel; the silica-alumina gel is dynamically crystallized at 145°C for 7 days, and the solid-liquid separation After washing and drying, a β molecular sieve was obtained, numbered B1. The main properties of the β molecular sieve are shown in Table 1.
[0040] Add 3000ml aluminum chloride solution (concentration 1.5mol / L) into a 5000ml beaker, add 28g B1 molecular sieve (99% dry basis) into the mixed solution, keep the temperature at 70℃, and continuously add 2mol / L ammonia until the pH is 4 , Evaporate at 85°C, dry the sucked white solid at 100°C for 3 hours, and calcinate at 500°C for 4 hours to obtain 276.2g ...
Example Embodiment
[0042] Example 3
[0043] Weigh 185.3g tetraethylammonium bromide (98wt%, technical grade), 22.65g sodium hydroxide, 10.3g pseudo-boehmite (70wt%, technical grade), 870g water, mix and stir until a clear solution, and then Add 180g of white carbon black (industrial grade) to the solution under constant stirring, and continue to stir to obtain a uniform silica-alumina gel; the silica-alumina gel is dynamically crystallized at 145°C for 7 days, after solid-liquid separation, washing and drying A β molecular sieve was obtained, numbered B2. The main properties of the β molecular sieve are shown in Table 1.
[0044] Add 3000ml aluminum chloride solution (concentration 1.5mol / L) into a 5000ml beaker, add 60.5g B2 molecular sieve (99% dry basis) into the mixed solution, keep the temperature at 70℃, and continuously add 2mol / L ammonia until the pH is 4. Evaporate at 85°C, dry the sucked white solid at 100°C for 3 hours, and calcinate at 500°C for 4 hours to obtain 296.4g of molecular sie...
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