A method for preparing hollow calcium oxide powder
A technology of hollow calcium oxide and pollen, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., to achieve thermal decomposition, control surface compactness, and good monodispersity
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Embodiment 1
[0024] 1) crushing limestone, sieving, adding deionized water for digestion, carrying out primary aging, obtaining primary aging slurry, and the concentration of calcium in primary aging slurry is 0.06mol / L;
[0025] 2) adding anhydrous ethanol to the ammonium bicarbonate aqueous solution to obtain an ammonium bicarbonate alcohol aqueous solution; wherein, the consumption of the anhydrous ethanol is 5-8% of the volume of the ammonium bicarbonate aqueous solution.
[0026] 3) Under stirring at 3000rpm, at the same speed of 60L / h, the primary aging slurry and the ammonium bicarbonate alcohol aqueous solution were rapidly sprayed into the reactor to generate white precipitate, the reaction temperature was 20-30°C, and the reaction was performed for 2min; quickly add a large amount of deionized water The sediment is diluted, and the slurry is subjected to secondary aging to obtain secondary aging slurry;
[0027] 4) collecting forget-me-not grass pollen, adding it to absolute etha...
Embodiment 2
[0032] 1) crushing limestone, sieving, adding deionized water for digestion, carrying out primary aging, obtaining primary aging slurry, and the concentration of calcium in primary aging slurry is 0.06mol / L;
[0033] 2) adding anhydrous ethanol to the ammonium bicarbonate aqueous solution to obtain an ammonium bicarbonate alcohol aqueous solution; wherein, the consumption of the anhydrous ethanol is 5-8% of the volume of the ammonium bicarbonate aqueous solution.
[0034] 3) Under stirring at 3000rpm, at the same speed of 60L / h, the primary aging slurry and the aqueous ammonium bicarbonate alcohol solution were rapidly sprayed into the reactor to generate a white precipitate, the reaction temperature was 20-30°C, and the reaction was performed for 1min; quickly add a large amount of deionized water The sediment is diluted, and the slurry is subjected to secondary aging to obtain secondary aging slurry;
[0035] 4) collecting forget-me-not grass pollen, adding it to absolute et...
Embodiment 3
[0040] 1) crushing limestone, sieving, adding deionized water for digestion, carrying out primary aging, obtaining primary aging slurry, and the concentration of calcium in primary aging slurry is 0.06mol / L;
[0041] 2) adding anhydrous ethanol to the ammonium bicarbonate aqueous solution to obtain an ammonium bicarbonate alcohol aqueous solution; wherein, the consumption of the anhydrous ethanol is 5-8% of the volume of the ammonium bicarbonate aqueous solution.
[0042] 3) Under stirring at 3000rpm, at the same speed of 60L / h, the primary aging slurry and ammonium bicarbonate alcohol aqueous solution were rapidly injected into the reactor to generate white precipitate, the reaction temperature was 20-30°C, and the reaction was performed for 4min; quickly add a large amount of deionized water The sediment is diluted, and the slurry is subjected to secondary aging to obtain secondary aging slurry;
[0043] 4) collecting forget-me-not grass pollen, adding it to absolute ethanol...
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Abstract
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