Preparation method and application of a modified Y molecular sieve and single-stage hydrocracking catalyst
A hydrocracking and molecular sieve technology, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as poor product properties, poor catalyst activity, and poor nitrogen resistance, and achieve high nitrogen resistance. , good active effect
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Embodiment 1
[0041] Molecular sieve modification process:
[0042] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it 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, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.5%;
[0043] (2) The molecular sieve obtained in step (1) was mixed with distilled water according to the liquid-solid ratio of 5:1, then, 150ml of ammonium fluorosilicate solution with a concentration of 1.3mol / L was added, and treated at 90°C for 2 hours;
[0044] (3) Hydrothermally treat the Y molecular sieve obtained in step (2) at 640°C and 0.3MPa for 2 hours.
[0045] (4) The molecular sieve obtained in step (3) is prepared according to a liquid-solid ratio of 10:1 and a hydrochloric acid solution with a concentration of 1.8mol / L (concentration is represented by H + meter) and mixed at 85°C for 2 hours a...
Embodiment 2
[0056] Molecular sieve modification process:
[0057] (1) Take 200g of NaY molecular sieve raw powder 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, exchange at 70°C for 3 hours, repeat this process 3 times, and the Y molecular sieve after exchange Na content in Na 2 O is calculated as 2.0%.
[0058] (2) The molecular sieve obtained in step (1) was mixed with distilled water according to the liquid-solid ratio of 5:1, then, 200ml of ammonium fluorosilicate solution with a concentration of 1mol / L was added, and treated at 80°C for 2 hours;
[0059] (3) Hydrothermally treat the Y molecular sieve obtained in step (2) at 600°C and 0.15MPa for 2 hours;
[0060] (4) The molecular sieve obtained in step (3) is mixed with H at a liquid-solid ratio of 7:1 + A mixed solution of hydrochloric acid with a concentration of 1.3mol / L was mixed and treated at 95°C for 2 hours;
[0061] (5) The molecular ...
Embodiment 3
[0071] Molecular sieve modification process:
[0072] (1) Take 200g of NaY molecular sieve raw powder 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, exchange at 70°C for 3 hours, repeat this process 3 times, and the Y molecular sieve after exchange Na content in Na 2 O is calculated as 2.0%.
[0073] (2) The molecular sieve obtained in step (1) was mixed with distilled water according to the liquid-solid ratio of 5:1, then, 220ml of ammonium fluorosilicate solution with a concentration of 0.8mol / L was added, and treated at 90°C for 1.5 hours;
[0074] (3) Hydrothermally treat the Y molecular sieve obtained in step (2) at 580°C and 0.15MPa for 1.5 hours, and repeat this process twice;
[0075] (4) The molecular sieve obtained in step (3) is mixed with H at a liquid-solid ratio of 7:1 + A mixed solution of hydrochloric acid with a concentration of 1.2mol / L was mixed and treated at 80°C for ...
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