A kind of catalytic cracking catalyst and preparation method thereof
A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of rare earth loss and reduced utilization rate of rare earth, and achieve high crystal retention, high utilization rate of rare earth, flexible rare earth The effect of content
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[0031] The preparation method of catalytic cracking catalyst provided by the invention preferably comprises the following steps:
[0032] (1) Contact the NaY molecular sieve with the rare earth solution or the mixed solution of the rare earth solution and the ammonium salt, filter, wash with water, and dry for the first time to obtain the rare earth sodium Y molecular sieve; then beat the rare earth sodium Y molecular sieve And contact with ammonium salt solution or acid solution, filter and mix with rare earth solution, adjust the pH value of the slurry to 6-10, filter or not filter, dry, and perform a second roasting treatment to obtain the rare earth solution provided by the invention Y-type molecular sieve (the first Y-type molecular sieve);
[0033] (2) Mix and beat the cracking active component, clay and binder, then spray dry, wash, filter and dry in sequence, wherein the cracking active component includes the rare earth-containing Y-type molecular sieve (the first Y t...
Embodiment 1
[0049] (1) Preparation of rare earth Y-type molecular sieve
[0050] Take 2.6 kg of NaY molecular sieve (Sinopec Catalyst Qilu Branch Company, 22.5% by weight, silicon-aluminum ratio 2.7, crystallinity 88%, the same below) and 15 kg of deionized water, mix and beat, add 1.0 liter concentration of 160gRE 2 o 3 / L of rare earth chloride solution and 0.24 kg of ammonium chloride solid, stir well, raise the temperature to 70°C and adjust the pH of the slurry to 4.0 with dilute hydrochloric acid, continue to exchange for 1.5 hours, filter, wash with water, and dry, and store under 100% steam Calcined at 550°C for 2 hours to obtain cross-calcined rare earth sodium Y molecular sieve Y-A1. The chemical composition of Y-A1 is 5.1% by weight of sodium oxide and 7.8% by weight of rare earth oxide. Then by molecular sieve: NH 4 Cl:H 2The ratio of O=1:0.2:10 is beaten and exchanged at 70°C for 1 hour. After filtering and washing, re-beating and adding 0.27 liters of concentration 300gRE...
Embodiment 2
[0055] The pseudo-boehmite of 22 weight parts on a dry basis is mixed with deionized water for beating, and adding concentration to the obtained slurry is 36% by weight hydrochloric acid peptization, the acid-aluminum ratio (the 36% by weight hydrochloric acid and The weight ratio of pseudo-boehmite on a dry basis) is 0.20, the temperature is raised to 65°C for acidification for 1 hour, and 34 parts by weight of kaolin slurry on a dry basis and 11 parts by weight of aluminum sol on a dry basis are added , stirred for 20 minutes, then added 31 parts by weight of rare earth Y-type molecular sieve Y-A and 2 parts by weight of DASY2.0 molecular sieve mixed slurry based on dry basis, and stirred for 30 minutes to obtain a solid content of 30% by weight The slurry was spray-dried to make a microsphere catalyst. The microsphere catalyst was calcined at 500°C for 1 hour, and then heated at 60°C with (NH 4 ) 2 SO 4 Washing ((NH 4 ) 2 SO 4 : microsphere catalyst: H 2 O weight rat...
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