Superfine powder composite metallic oxide catalyst and application thereof
A composite metal and ultrafine powder technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical/physical process, etc., can solve the problem of low metal content, high cost and large usage and other problems, to achieve the effect of high conversion rate of residual oil, high yield of distillate oil and high economic applicability
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Embodiment 1
[0024] Prepare catalyst A according to the sol-gel method: take by weighing the ammonium molybdate and ferric nitrate of calculated amount according to the amount of producing 15g catalyst, add deionized water respectively for dissolving, stir the ammonium molybdate solution at room temperature and add ferric nitrate solution dropwise to form Yellow precipitate. Add citric acid in an amount of 0.5 moles of molybdenum. Stir well to form a clear light yellow solution, and then use ammonia water to adjust the pH value to 3.0-13.0. Dry at 105°C overnight to obtain a gel, and finally bake at 500°C for 4 hours to obtain catalyst A, which is a composite Mo-Fe oxide ultrafine powder. The molar ratio of Mo and Fe is 3:2, and the average particle size of catalyst A is 20-100nm.
Embodiment 2
[0026] Prepare catalyst B according to the sol-gel method: weigh the calculated amount of ammonium molybdate, iron nitrate and cobalt nitrate according to the amount of 15g catalyst produced, add deionized water to dissolve, mix iron nitrate and cobalt nitrate aqueous solution, and stir at room temperature Ammonium molybdate solution and a mixed solution of ferric nitrate and cobalt nitrate were added dropwise to form a yellow-red precipitate. Add citric acid in an amount of 0.5 moles of molybdenum. Stir well to form a clear yellow-red solution, then adjust the pH value to 3.0-13.0 with ammonia water. Dry at 105°C overnight to obtain a gel, and finally bake at 500°C for 4 hours to obtain catalyst B, which is a composite Mo-Fe-Co oxide superfine Powder, wherein the molar ratio of Mo, Fe and Co is 2:2:1, and the average particle size of catalyst B is 20-100nm.
Embodiment 3
[0028] Prepare catalyst C according to the coprecipitation method: weigh the calculated amount of ammonium molybdate and ferric nitrate according to the amount of 15g catalyst produced, add deionized water to dissolve them respectively, stir the ammonium molybdate solution at room temperature and add ferric nitrate solution dropwise to form a yellow precipitate . Then adjust the pH value with ammonia water to make the precipitation more complete. Dry at 105°C overnight, and finally bake at 500°C for 4 hours to obtain catalyst C, which is a composite Mo-Fe oxide ultrafine powder, wherein the molar ratio of Mo to Fe is 3:1, and the average particle size of catalyst C is 20- 100nm.
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