Catalytic cracking catalyst containing high-silicon shape-selective molecular sieve and preparation method thereof
A shape-selective molecular sieve and catalytic cracking technology, which is applied in molecular sieve catalysts, catalyst activation/preparation, catalytic cracking, etc., can solve the problems of high energy consumption and material consumption, long process, etc., to reduce environmental protection emissions, reduce energy consumption, and reduce synthesis cost effect
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Embodiment 1
[0031] The present embodiment provides a method for preparing a catalytic cracking catalyst containing a high-silicon shape-selective molecular sieve, the specific method comprising the following steps (1-2):
[0032] (1) Sodium-type high-silicon ZSM-5 molecular sieve with a silicon-aluminum ratio of 200 (without demolding and ion exchange) mixed with kaolin and aluminum sol according to the mass ratio of kaolin:aluminum sol:molecular sieve=5:1.5:3.5 , and then spray the mixture at high temperature and bake it at 600°C for 60 minutes;
[0033](2) Weigh 160g of deionized water and 40g of the sample after spray roasting, pour it into a 1000ml beaker and stir in a 90°C water bath; weigh 10.5g of ammonium sulfate (5wt%), add it to the above mixture, and stir and exchange in a 90°C water bath for 0.5h ; Suction filter the above mixed solution, no need to add water, just drain it, and exchange it again in the same steps; Suction filter the above mixed solution again, add deionized w...
Embodiment 2
[0036] The present embodiment provides a method for preparing a catalytic cracking catalyst containing a high-silicon shape-selective molecular sieve, the specific method comprising the following steps (1-3):
[0037] (1) Weigh 400g of deionized water and 40g of sodium-type high-silicon ZSM-5 molecular sieve with a silicon-aluminum ratio of 200 (without demolding and ion exchange), pour it into a 1000ml beaker, and stir in a water bath at 80°C; weigh 21.4g of chlorine Add ammonium chloride (1mol / L), add the above mixed solution, stir in a water bath at 80°C, and exchange for 3 hours; filter the above mixed solution without adding water, just drain it; weigh 400g of deionized water and 21.4g of ammonium chloride of the same quality , mix it with the obtained filter cake, stir in a water bath at 80°C, and exchange for 3h; filter the above mixed solution with suction, add deionized water, filter until neutral, and dry at 80-120°C for 12-24h;
[0038] (2) Mix ammonium-exchanged mo...
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