Catalytic cracking catalyst and preparation method thereof
A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as increased environmental protection pressure, increased ammonia nitrogen wastewater discharge, and increased post-treatment costs, reducing production costs and improving The effect of production efficiency
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[0023] In the process of preparing the mesoporous silica-alumina material, the non-ion-exchanged mesoporous silica-alumina material may be various mesoporous silica-alumina materials without any ion exchange commonly used in the art. The non-ion-exchanged mesoporous silica-alumina material can be prepared according to conventional methods, and the preparation method can include, for example, neutralizing the aluminum source and alkali solution at room temperature to 85°C to form a gel, and the final pH of the gel is 7 -11; then follow SiO 2 : Al 2 o 3 =1:(0.6-9) weight ratio Add silicon source, age at room temperature to 90°C for 1-10 hours, and then filter. In the present invention, the silica-alumina precipitate obtained after the filtration can be directly used as the non-ion-exchanged mesoporous silica-alumina material, or it can be used as the ion-free mesoporous silica-alumina material after being dried and / or calcined. Exchanged mesoporous silica-alumina materials. ...
Embodiment 1
[0066] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.
[0067] (1) Preparation of mesoporous silicon-aluminum materials
[0068] The concentration is 90g Al 2 o 3 / L Al 2 (SO 4 ) 3 solution and concentration is 102g Al 2 o 3 / L, NaAlO with a caustic ratio of 1.7 2 The solution is fed into the continuous gelling kettle in parallel, the effective volume of the gelling kettle is 200ml, Al 2 (SO 4 ) 3 The flow rate of the solution is 20ml / min, adjust NaAlO 2 The flow rate keeps the gelling pH value at 9, and the gelling temperature is 55°C; collect 300ml of the gelled slurry, and add 127ml of SiO with a content of 60g under stirring conditions 2 / L of water glass aqueous solution, heated to 80°C for aging for 4 hours, and then filtered.
[0069] The silicon-aluminum precipitate obtained after filtration is mixed with water at a weight ratio of 1:12 for beating, and then the hydrochloric acid solution is added into ...
Embodiment 2-7
[0073] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.
[0074] Prepare catalytic cracking catalyst according to the method of embodiment 1 respectively, difference is, in step (2), mesoporous silica-alumina material, kaolin, described first Y-type molecular sieve, described second Y-type molecular sieve, described The third Y-type molecular sieve, pseudo-boehmite, and aluminum sol are shown in Table 1 below in terms of feed intake in dry basis and rare earth chloride in rare earth oxide, wherein the rare earth chloride is in the form of rare earth chloride The form of the solution is mixed with the slurries of other components and sprayed evenly after beating, and the feeding amount of each component is calculated in parts by weight, so as to prepare catalytic cracking catalysts C2-C7 respectively.
[0075] Table 1
[0076]
PUM
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