Preparation method of gallium-based catalyst taking non-metallic element modified aluminum oxide as carrier
A non-metallic element, alumina technology, used in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, carbon compound catalysts, etc., can solve problems such as poor stability, and achieve improved stability and low cost. , the effect of high catalytic stability
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Embodiment 1
[0033] Use melamine as the solute and formaldehyde as the solvent to prepare a melamine-formaldehyde solution with a nitrogen concentration of 5 mg / mL; then add 1.2 mL of the melamine-formaldehyde solution to 0.6 g of alumina, and then add 8.8 mL of the formaldehyde solution to achieve excessive impregnation to ensure the total The volume is 10 mL. Stir at room temperature for 30 minutes, then heat the temperature to 110°C, stir until dry, and then dry in an oven at 110°C for 10 hours. The dried product was calcined at 800° C. for 1 h under nitrogen atmosphere, and then calcined at 550° C. for 1 h under air condition to obtain a nitrogen-doped alumina carrier. Use gallium nitrate as the solute and ethanol as the solvent to prepare a gallium nitrate ethanol solution with a gallium concentration of 5 mg / mL; take 3 mL of the gallium nitrate ethanol solution and add it to 0.3 g of nitrogen-doped alumina carrier, stir at room temperature for 30 min, and then stir The final solid-l...
Embodiment 2
[0035] Use boric acid as the solute and absolute ethanol as the solvent to prepare a boric acid absolute ethanol solution with a boron concentration of 5 mg / mL; then add 6 mL of boric acid absolute ethanol solution to 0.6 g of alumina, and then add 4 mL of ethanol to achieve excessive impregnation , to ensure a total volume of 10 mL. Stir at room temperature for 30 minutes, then heat the temperature to 100°C, stir until dry, and then dry in an oven at 100°C for 10 hours. The dried product was calcined at 800° C. for 1 h under a nitrogen atmosphere, and then calcined at 650° C. for 4 h under an air condition to obtain a boron-doped alumina carrier. Use gallium nitrate as the solute and ethanol as the solvent to prepare a gallium nitrate ethanol solution with a gallium concentration of 5 mg / mL; take 3 mL of the gallium nitrate ethanol solution and add it to 0.3 g of boron-doped alumina carrier, stir at room temperature for 30 min, and then stir The final solid-liquid mixture wa...
Embodiment 3
[0037] Use diamine hydrogen phosphate as the solute and water as the solvent to prepare a diamine hydrogen phosphate solution with a phosphorus concentration of 5 mg / mL; then add 6 mL of diammonium hydrogen phosphate solution to 0.6 g of alumina, and then add 4 mL of ethanol to make it reach an excess Dipping to ensure a total volume of 10 mL. Stir at room temperature for 30 minutes, then heat the temperature to 110°C, stir until dry, and then dry in an oven at 110°C for 10 hours. The dried product was calcined at 600° C. for 2 h under a nitrogen atmosphere, and then calcined at 650° C. for 4 h under an air condition to obtain a phosphorus-doped alumina carrier. Use gallium nitrate as the solute and ethanol as the solvent to prepare a gallium nitrate ethanol solution with a gallium concentration of 5 mg / mL; take 3 mL of the gallium nitrate ethanol solution and add it to 0.3 g of phosphorus-doped alumina carrier, stir at room temperature for 30 minutes, and then stir The final...
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