Low-temperature reduced catalytic cracking flue gas sulfur-transfer agent and preparation process thereof
A catalytic cracking, flue gas sulfur technology, applied in catalytic cracking, chemical instruments and methods, cracking, etc., can solve problems such as unsatisfactory use effect
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Embodiment 1
[0034] Magnesium oxide (specific surface area greater than 150m 2 / g), pseudo-boehmite (specific surface area greater than 400m 2 / g) and cerium oxide are ground in a high-speed shear mixer; spray-dried, sieved at 100-150 microns, calcined at 700°C for 4 hours, then hydrated and impregnated with ammonium metavanadate, dried, and calcined at 700°C for 4 hours to obtain a low-temperature Reduced catalytic cracking flue gas sulfur transfer agent S1; the magnesium-aluminum molar ratio in the product is 4, calculated on a dry basis of oxides, magnesium-aluminum oxide accounts for 80wt%, cerium oxide accounts for 17.5wt%, and vanadium pentoxide is Base accounted for 2.5wt%.
Embodiment 2
[0036] Magnesium hydroxide (specific surface area greater than 20m 2 / g), pseudo-boehmite (specific surface area greater than 400m 2 / g) and cerium oxide were ground in a colloid mill; then hydrated and impregnated with ammonium metavanadate, dried, and calcined at 750°C for 2h; after extrusion, sieved at 50-100 microns, calcined at 750°C for 2h to obtain low-temperature reduced Catalytic cracking flue gas sulfur transfer agent S2; the magnesium-aluminum molar ratio in the product is 3, calculated on a dry basis of oxides, magnesium-aluminum oxide accounts for 80wt%, cerium oxide accounts for 15wt%, and vanadium pentoxide accounts for 5wt%.
Embodiment 3
[0038] Magnesium aluminum carbonate hydrotalcite (single sheet thickness less than 20nm) is ultrasonically ground, hydrated and impregnated with cerous nitrate, dried, and calcined at 750°C for 2 hours; granulated, sieved at 50-150 microns, and calcined at 750°C The low-temperature reduced catalytic cracking flue gas sulfur transfer agent S3 was prepared in 2 hours; the magnesium-aluminum molar ratio in the product was 4, and the magnesium-aluminum oxide accounted for 80wt% and the cerium oxide accounted for 20wt% based on the oxide dry basis.
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