A kind of anti-nitrogen hydrocracking catalyst and preparation method thereof
A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, catalyst carriers, molecular sieve catalysts, etc., can solve the problems of poor catalyst activity, poor nitrogen resistance, low cracking activity, etc. The number of secondary holes, the effect of improving the liquid yield
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Embodiment 1
[0039] Molecular sieve modification process:
[0040] (1) Take 200g of the original NaY molecular sieve powder prepared in the laboratory, mix with ammonium nitrate with a concentration of 0.5mol / L according to the liquid-solid ratio of 3:1, exchange at 70 °C for 3 hours, repeat this process 3 times, the Y molecular sieve after exchange Na content in Na 2 O counts as 2.5%;
[0041] (2) hydrothermally heat the Y molecular sieve obtained in step (1) at 540°C and 0.1Mpa for 2 hours;
[0042] (3) The molecular sieve obtained in step (2) is citric acid solution with a liquid-solid ratio of 5:1 and 0.3mol / L (concentration is H + meter) 300ml mixed, and then heated to 40 ℃, constant temperature reaction for 2 hours;
[0043] (4) The molecular sieve obtained in step (3) was dried at 150°C for 8 hours;
[0044] (5) Take the molecular sieve obtained in step (4) and place it in an airtight container filled with butene atmosphere, control the pressure to 0.3MPa and fully contact for 2...
Embodiment 2
[0054] Molecular sieve modification process:
[0055] (1) Take the original powder of NaY molecular sieve prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.8mol / L according to the liquid-solid ratio of 3:1, and exchange it at 70 °C for 3 hours. Repeat this process 3 times. Na content in Na 2 O counts as 2.0%.
[0056] (2) Hydrothermal treatment of the Y molecular sieve obtained in step (1) at 560°C and 0.1Mpa for 2 hours;
[0057] (3) Step (2) Sieve the citric acid solution (concentration is H + meter) 400ml mixed, then heated to 50 ℃, constant temperature reaction for 2 hours;
[0058] (4) The molecular sieve obtained in step (3) was dried at 200°C for 4 hours;
[0059] (5) soak the molecular sieve obtained in step (4) in heptene for 4 hours, and then heat it in an air atmosphere at 200°C for 22 hours;
[0060] (6) The molecular sieve treated in step (5) is directly placed in a muffle furnace preheated to 500°C, and calcined for 12 minute...
Embodiment 3
[0069] Molecular sieve modification process:
[0070] (1) Take the original powder of NaY molecular sieve prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.5mol / L according to the liquid-solid ratio of 5:1, and exchange it at 90 °C for 1.5 hours. Repeat this process twice. The Na content was 1.8% as Na2O.
[0071] (2) Hydrothermal treatment of the Y molecular sieve obtained in step (1) at 550°C and 0.1Mpa for 2 hours;
[0072] (3) Step (2) Sieve the citric acid solution (concentration is H + meter) 400ml mixed, and then heated to 60 ℃, constant temperature reaction for 2 hours;
[0073] (4) The molecular sieve obtained in step (3) was dried at 250°C for 2h;
[0074] (5) soak the molecular sieve obtained in step (4) in heptene for 4 hours, and then heat at 200°C for 10 hours in an air atmosphere;
[0075] (6) The molecular sieve treated in step (5) is directly placed in a muffle furnace preheated to 500°C, and calcined for 30 minutes;
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