Method for synthesizing ZSM-5 zeolite with multilevel pore canals

[0033] Stir 30ml of methyl orthosilicate, 6g of polyethylene glycol and 30ml of 0.01mol / L acetic acid solution evenly, seal it, and stir at 0°C for 50min. The obtained sol was poured into a polytetrafluoroethylene test tube or a glass tube, and aged in a water bath at 30°C for one day to obtain a wet silica gel column. Then soak the silica gel column with 0.01mol / L ammonia water to prepare mesopores. Then soak the column with 0.1mol / L nitric acid solution, distilled water, 30% ethanol / water ethanol solution and Tween 80 for 6 hours, finally dry and roast to obtain the silica gel monolithic column B 1 .

[0035] According to the mass ratio of 1.25 sucrose: 0.14H 2 SO 4 : 5 water to make a solution, put the silica gel monolithic column B1 into it and soak for 30 minutes, then dry at 100°C for 6 hours, 160°C for 6 hours, repeat the process of soaking, drying, and polymerization once, and then carbonize at 900°C for 4 hours to obtain carbon Silicon composite sample E1.

[0037] 0.038 gram of sodium aluminate, 0.08 gram of sodium hydroxide, 1 gram of tetraethylammonium hydroxide solution and 2 grams of water were mixed and stirred evenly, and then this solution was poured into a reaction kettle equipped with 1.3 gram of carbon-silicon complex E1, Stir to make it fully wet, seal the reactor and crystallize at 150°C for 48 hours. After crystallization, cool, filter and wash, then dry in an oven at 100-110°C for 3-4 hours, and then burn the resultant in a muffle furnace at 600°C for 5 hours to obtain the product multi-level channel ZSM-5 , denoted as A1.

[0038] The XRD spectrum of A1 is shown in Figure 1. It can be seen from Figure 1 that all the figures have diffraction peaks at 2θ angles of 7.9°, 8.9°, 23.1°, 23.9°, and 24.4°. The diffraction peaks at these five places are The characteristic peak of ZSM-5 shows that the crystal form of the product synthesized in this example is ZSM-5.

[0039] The SEM image of A1 is shown in Figure 3. It can...