Fe-mn series catalyst for direct preparation of light olefins from synthesis gas and preparation method thereof
A low-carbon olefin and catalyst technology, applied in the field of Fe-Mn series catalysts and their preparation, can solve the problems of easy flying temperature, easy deactivation of catalysts, difficult reaction heat removal and the like
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Embodiment 1
[0030] The ferric nitrate nonahydrate of 606.03g and the rhenium trichloride of 0.44g were dissolved in water to form a solution, and then the solution was centrifuged with 400g of 25% by weight of concentrated ammonia and washed three times with deionized water to obtain fresh Mixed precipitation I of ferric hydroxide and rhenium oxide; add 13.45g of 50% by weight manganese nitrate to a certain amount of water to make solution II, mix and peptize solution II with mixed precipitate I to obtain colloidal slurry III; mix 49.5 g SiO with a weight content of 40% 2 Add the sol and 0.084g potassium hydroxide to the slurry III, mix and beat, then add 0.098g of 15% by weight dilute sulfuric acid, and adjust the pH value of the slurry to 5 with ammonia water to obtain a sol-like dispersion that is uniform and will not stand for a long time. Layered uniform slurry IV (solid content 45%), the slurry was spray-dried and molded, the inlet temperature of the sprayer was 380°C, the outlet te...
Embodiment 2
[0033]The ferric nitrate nonahydrate of 606.03g and the osmium trichloride of 44.49g are dissolved in water and made into solution, then this solution and the strong ammonia water of 400g 25% by weight are flowed side by side and centrifuged, and after washing three times with deionized water, fresh Mixed precipitation I of iron hydroxide and osmium oxide; 1345g of 50% manganese nitrate was dissolved in water to make solution II, solution II was mixed with mixed precipitate I to obtain colloidal slurry III; 1016g weight content was 25% Al 2 o 3 The sol and 20.47g 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 value of the slurry was adjusted to 1 with dilute nitric acid to obtain a sol-like dispersion that was evenly dispersed and would not separate after a long time The homogeneous slurry IV (solid content 15%) was spray-dried to form the slurry. The inlet temperature of the spray ma...
Embodiment 3
[0036] Get 367.43g of ferric citrate and 3.52g of rhenium trichloride dissolved in water to form a solution, then the solution and 400g of 25% by weight of concentrated ammonia flow side by side and then centrifuged, washed three times with deionized water to obtain fresh ferric hydroxide Mixed precipitation I with rhenium oxide; add 26.90g of 50% by weight manganese nitrate to a certain amount of water to make solution II, mix solution I and mixed precipitate II to obtain colloidal slurry III; mix 435g of 40% by weight SiO 2 The sol and 4.8g sodium hydroxide are added to the slurry III, mixed and beaten, then 0.294g of 15% by weight dilute sulfuric acid is added, and the pH value of the slurry is adjusted to 3 with dilute ammonia water to obtain a sol-like dispersion that is evenly dispersed and will not stand for a long time. Stratified homogeneous slurry IV (solid content 35%), the slurry was spray-dried and molded, the inlet temperature of the sprayer was 230 ° C, the outl...
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