Preparation method and preparation system of catalytic cracking catalyst of phosphorus-containing modified MFI structure molecular sieve
A catalytic cracking and molecular sieve technology, applied in molecular sieve catalysts, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of complex preparation process of cracking catalysts and complex phosphorus modification process
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 Dissolve 16.2 g of diammonium hydrogen phosphate (Tianjin Guangfu Technology Development Co., Ltd., analytically pure, the same below) in 60 g of deionized water, stir for 0.5 h to obtain a phosphorus-containing aqueous solution, add 113 g of HZSM-5 molecular sieve (Sinopec Catalyst Company Qilu Branch supplied with a relative crystallinity of 91.1%, a silica / alumina molar ratio of 24.1, Na 2 O content is 0.039wt%, specific surface area is 353m 2 / g, the total pore volume is 0.177ml / g, the same below), modified by dipping method, after dipping at 20 °C for 2 hours, it is mixed with Y-type molecular sieve (PSRY molecular sieve), kaolin and pseudo-boehmite, and decationized Water and aluminum sol were beaten for 120 minutes to obtain a slurry with a solid content of 30% by weight. Hydrochloric acid was added to adjust the pH value of the slurry to 3.0, and then the beating was continued for 45 minutes. Spray drying and molding to obtain microspheres. The microspheres are...
 The same as Example 1-1, the difference is that the phosphorus-modified molecular sieve mixes diammonium hydrogen phosphate, HZSM-5 molecular sieve and water into a slurry, and then heats up to 100 ° C for 2 hours. A catalytic cracking catalyst sample was prepared, numbered CFZY1-2. The evaluation is the same as that of Example 1-1, and the results are shown in Table 3.
 Same as Example 1-1, the difference is that 16.2g of diammonium hydrogen phosphate was dissolved in 120g of deionized water at 50°C, stirred for 0.5h to obtain a phosphorus-containing aqueous solution, added with 113g of HZSM-5 molecular sieve, modified by impregnation method, Immersion at 20°C for 2 hours; external pressure is applied and water is added, and pressurized hydrothermal calcination is carried out at 600°C, 0.5Mpa, 30% steam atmosphere for 2h. A catalytic cracking catalyst sample was prepared, numbered CFZY2-1.
 The evaluation is the same as that of Example 1-1, and the results are shown in Table 4.
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