Method for preparing superfine mesoporous alumina and obtained product
A technology of mesoporous alumina and aluminum alloy, which is applied in the preparation of alumina/hydroxide, chemical instruments and methods, aluminum compounds, etc., can solve the problems of difficult large-scale production, high operating conditions, and long reaction routes. , to achieve the effect of wide application, easy operation and uniform particle size
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Embodiment 1
[0032] A method for preparing mesoporous alumina, comprising the steps of:
[0033] 1) Melting metal aluminum and adding a catalyst, casting the molten alloy liquid into aluminum alloy balls with a diameter of 10-20 mm;
[0034] The catalyst is an alloy composed of one or more of the following low melting point metals, or a compound containing one or more of the following low melting point metals: tin, bismuth, mercury, indium, lead, bismuth, zinc, Potassium, lithium and antimony, the mass of the catalyst accounts for 0.05-1.5% of the total mass of the raw materials.
[0035] Specifically in this embodiment, the catalyst adopts bismuth indium tin zinc alloy Bi 35 In 48.6 sn 16 Zn 0.4 , the mass of the catalyst accounts for 0.5% of the total mass of the raw material.
[0036] 2) Deionized water is heated to a temperature of 60° C., and the aluminum alloy balls are added into the deionized aqueous solution to react until the aluminum alloy balls are completely consumed.
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Embodiment 2
[0048] A method for preparing ultrafine mesoporous alumina, comprising the following steps:
[0049] 1) Metal aluminum is melted and a catalyst is added, and the molten alloy solution is cast into aluminum alloy balls with a diameter of 2 to 5 mm; the catalyst components and dosage are the same as those in Example 1.
[0050] 2) Heating 10% (wt) ammonium oxalate aqueous solution to 60° C., adding the aluminum alloy balls into the ammonium salt aqueous solution to react until the aluminum alloy balls are completely consumed.
[0051] 3) drying the slurry obtained by the reaction to remove moisture; the drying method is one or more of natural drying, drying, vacuum freeze drying, spray drying, organic solvent washing and suction filtration;
[0052] 4) In a muffle furnace, the dried powder was calcined at 500° C. for 2 hours to obtain a mesoporous alumina powder.
[0053]The particle size of the slurry obtained from the above reaction of aluminum alloy balls and ammonium oxalat...
Embodiment 3
[0069] A method for preparing ultrafine mesoporous alumina, comprising the following steps:
[0070] 1) Metal aluminum is melted and a catalyst is added, and the molten alloy solution is cast into aluminum alloy balls with a diameter of 2 to 5 mm; the catalyst components and dosage are the same as those in Example 1.
[0071] 2) Heating 10% (wt) ammonium acetate aqueous solution to 60° C., adding the aluminum alloy balls into the ammonium salt aqueous solution to react until the aluminum alloy balls are completely consumed.
[0072] 3) drying the slurry obtained by the reaction to remove moisture; the drying method is suction filtration-washing with absolute ethanol;
[0073] 4) Calcining the dried powder in a muffle furnace at 500° C. for 2 hours to obtain a mesoporous alumina powder.
[0074] The particle size of the slurry obtained from the above reaction of aluminum alloy balls and ammonium acetate aqueous solution is D 50 2.452μm, the particle size of the mesoporous al...
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