Fluid bed catalyst for producing ethylene and propylene by catalytic cracking method
A fluidized bed catalyst, catalytic cracking technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, molecular sieve catalysts, etc., can solve the problem of high reaction temperature, low yield, and poor catalyst activity Advanced problems, to achieve the effect of strong low temperature activity and good technical effect
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Embodiment 1
[0032] Get 3 grams of ammonium metavanadate, add 100 milliliters of water, drop into 2 milliliters of 80% phosphoric acid, add 3 grams of oxalic acid, heat until the ammonium metavanadate dissolves, and obtain solution (I).
[0033] Another 5.89 g of bismuth nitrate was dissolved in 10 ml of 1:1 concentrated nitric acid to obtain a yellow solution. Another 30 grams of ammonium molybdate was dissolved in 200 milliliters of water, poured into the bismuth nitrate solution, and stirred to obtain solution (II).
[0034] Take 7.86 grams of cobalt nitrate, 5.58 grams of cerium nitrate, and 6.72 grams of calcium nitrate, and dissolve the three together in 250 milliliters of water to obtain solution (III).
[0035] Mix the solutions (I), (II) and (III), heat and stir in a water bath at 70-80°C, add 26 grams of silicon dioxide weighed, reflux for 5 hours, and then dry it with a spray dryer to form. After sieving the obtained powder, place it in a muffle furnace and raise the temperatur...
Embodiment 2
[0041]Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 33.3 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 24.4 grams of B Diamine, after stirring for 30 minutes, adjust the pH value at 11.5 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: ethylenediamine: H 2 O=1:0.1:0.4:40, put the mixed solution in an autoclave, keep it at 180°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, and roast at 550°C for 3 hours to prepare ZSM -5 and mordenite composite molecular sieve. Use ammonium nitrate solution with a concentration of 5%, exchange twice at 70°C, and then roast at 550°C for 3 hours, repeat twice to prepare hydrogen ZSM-5 / mordenite composite molecular sieve.
[0042] Prepare solution (I) with embodiment 1.
[0043] Another 30 g of ammonium molybdate, 7.61 g of i...
Embodiment 3
[0049] Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 33.3 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 24.4 grams of B Diamine, after stirring for 30 minutes, adjust the pH value at about 11 with dilute sulfuric acid, add 5 grams of Y zeolite seed crystals, and control the molar ratio of the sol: Si: Al: ethylenediamine: H 2 O=1:0.1:0.4:40, put the mixed solution into an autoclave, keep it at 120°C for 36 hours, then take it out and wash it twice, dry it at 120°C for 4 hours, and bake it at 550°C for 3 hours to obtain ZSM-5 Composite molecular sieve with Y zeolite. Using 5% ammonium nitrate solution, exchanging twice at 70°C, roasting at 550°C for 3 hours, and repeating twice to prepare hydrogen ZSM-5 / Y zeolite composite molecular sieve.
[0050] Prepare solution (I) with embodiment 1.
[0051] Another 30 g of...
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