Fe-Mn-based catalyst for preparing low-carbon olefin directly from synthesis gas and preparation method of Fe-Mn-based catalyst
A technology for low-carbon olefins and catalysts, which is applied in the field of Fe-Mn catalysts and their preparation, and can solve the problems of easy overheating, difficulty in removing heat from the reaction, and low weight selectivity of low-carbon olefins
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Embodiment 1
[0030] Take 606.03g of ferric nitrate nonahydrate and 0.44g of rhenium trichloride to dissolve in water to prepare a solution, and then the solution and 400g of 25% by weight concentrated ammonia water are flowed in parallel and centrifuged, and washed with deionized water three times to obtain fresh Mixed precipitation of ferric hydroxide and rhenium oxide I; 13.45g of 50% by weight manganese nitrate and a certain amount of water are added to make solution II, solution II and mixed precipitate I are mixed and peptized to obtain colloidal slurry III; 49.5 g 40% SiO by weight 2 The sol and 0.084g potassium hydroxide were added to the slurry III, mixed and beaten, then 0.098g 15% by weight dilute sulfuric acid was added, and the pH of the slurry was adjusted to 5 with ammonia water to obtain a sol-like dispersion that is uniform and will not be stored for a long time. Layered uniform slurry IV (solid content 45%), the slurry is spray-dried to form, the sprayer inlet temperature is...
Embodiment 2
[0033] Take 606.03g of ferric nitrate nonahydrate and 44.49g of osmium trichloride to dissolve in water to make a solution, then the solution is mixed with 400g of 25% by weight concentrated ammonia water and centrifuged, and washed with deionized water three times to obtain fresh Mixed precipitation of ferric hydroxide and osmium oxide I; Dissolve 1345g of 50% manganese nitrate in water to make solution II, mix and peptize solution II with mixed precipitate I to obtain colloidal slurry III; make 1016g weight content 25% Al 2 O 3 The sol and 20.47g of cesium nitrate were added to the slurry III, mixed and beaten, and then 19.6g of 15% by weight dilute phosphoric acid was added, and the pH of the slurry was adjusted to 1 with dilute nitric acid. The sol-like dispersion was uniformly dispersed and would not be separated after a long time The uniform slurry IV (solid content 15%) is spray-dried to form the slurry. The inlet temperature of the sprayer is 200°C and the outlet tempera...
Embodiment 3
[0036] Take 367.43g of ferric citrate and 3.52g of rhenium trichloride to dissolve in water to make a solution, and then the solution and 400g of 25% by weight concentrated ammonia water are flowed in parallel and centrifuged, and washed with deionized water three times to obtain fresh hydroxide Mixed precipitation of iron and rhenium oxide I; 26.90g of 50% by weight of manganese nitrate and a certain amount of water are added to make solution II, and solution I and mixed precipitate II are mixed and beaten to obtain colloidal slurry III; 435g weight content 40 % SiO 2 The sol and 4.8g sodium hydroxide were added to the slurry III, mixed and beaten, and then 0.294g of 15% by weight dilute sulfuric acid was added, and the pH of the slurry was adjusted to 3 with dilute ammonia to obtain a sol-like dispersion that is uniform and will not be stored for a long time. Layered uniform slurry IV (solid content 35%), spray dried the slurry, sprayer inlet temperature is 230 ℃, outlet tempe...
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