Catalytic cracking catalyst and preparation method thereof
A catalytic cracking, catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of improving the yield of propylene, not publicly disclosed, etc.
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[0050] The preparation method of the catalytic cracking catalyst provided by the present invention includes mixing and beating natural minerals, the first molecular sieve, an oxide binder such as oxide sol and / or oxide gel, and water. The amount of each component is such that the final catalyst contains, based on the total weight of the catalyst, 5% to 65% by weight of natural minerals, 10% to 60% by weight of oxides and 24% to 75% by weight of the second A molecular sieve. More preferably, the amount of each component is such that the composition of the final catalyst includes: the natural mineral content is 5% to 50% by weight on a dry basis, such as 8 to 45% by weight, and the content of the first molecular sieve on a dry basis is 30 wt %-65 wt % is, for example, 30-55 wt %, and the content of the oxide binder is 15-55 wt %, for example, 25-50 wt % or 20-50 wt %. .
[0051] The preparation method of the catalytic cracking catalyst provided by the present invention, the na...
Embodiment 1
[0072] Mix 333.3g aluminum sol with 148g kaolin, and use decationized water to prepare it into a slurry with a solid content of 28% by weight. After stirring for 1 hour, add the slurry comprising 114g (on a dry basis) ZSM-5 molecular sieve to form a composition The slurry (with a solid content of 30% by weight) was uniformly stirred, and spray-dried to produce composition microspheres, and then the composition microspheres were calcined at 500° C. for 1 hour to obtain the first composition microspheres A1.
[0073] Take 200 g of the first composition microspheres A1 (dry basis mass, the same below) prepared above, add water and beat to obtain a slurry with a solid content of 10% by weight, add 15.1 g of high alkali sodium metaaluminate solution (Na 2 O is 290g / L, Al 2 o 3 40g / L, the solution density is 1.353g / mL), heated up to 50°C and stirred at constant temperature for 0.5h, filtered and washed to neutral (washing to neutral means that the washing liquid after washing is neut...
Embodiment 2
[0075] Mix 529.4g silica sol with 32g montmorillonite, and use decationized water to prepare it into a slurry with a solid content of 22.2% by weight. After stirring for 2 hours, add 141g (dry basis) ZRP-1 molecular sieve, stir evenly, and form the first The composition slurry (with a solid content of 35% by weight) was spray-dried to form composition microspheres, and then the composition microspheres were calcined at 350° C. for 2 hours to obtain the first composition microspheres B1.
[0076] Take 200 g of the first composition microspheres B1 (mass on a dry basis) prepared above, add water to prepare the first composition microsphere slurry with a solid content of 10% by weight, add 20.5 g of NaOH (purity: 96%), heat up to 70 ° C and stir at a constant temperature 0.3h, filter and wash until neutral; add water to the filter cake and beat to obtain a slurry with a solid content of 10% by weight, add 25.1g oxalic acid during stirring, then add 54g hydrochloric acid (HCl mass ...
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