Modified diatomite and preparation method thereof
A diatomite modification technology, applied in the field of modified diatomite and its preparation, can solve the problems of MoO3 volatility and high product toxicity, lack of mercury oxidation ability, low oxidation ability, etc., to improve mechanical strength and Erosion resistance, specific surface area improvement, and oxidation ability improvement effect
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Embodiment 1
[0050] Preparation of Modified Diatomite
[0051] The commercially available diatomite is modified once with a nitric acid solution of PH=0.1, and the pre-modified diatomite is obtained by boiling, cooling, suction filtration, washing, drying, roasting, etc., and the diatomite is added to the nitric acid solution , configured into a slurry with a concentration of 50% by weight, and obtained pre-modified diatomite by boiling, cooling, suction filtration, washing, drying, and roasting. at 500°C, and the calcination time is 16h. After the calcination, the required pre-modified diatomite is obtained; the pre-modified diatomite is modified twice with ferric nitrate with a concentration of 20% by weight, and the pre-modified diatomite is The diatomite is added into the ferric nitrate solution to prepare a slurry with a mass concentration of 40%. After drying and roasting, the secondary modified diatomite is obtained. The drying temperature is 100°C, dried for 16 hours, and the calci...
Embodiment 2
[0070] Preparation of Modified Diatomite
[0071] The commercially available diatomite is modified once with a nitric acid solution of PH=0.06, and the pre-modified diatomite is obtained by boiling, cooling, suction filtration, washing, drying, roasting, etc., and the diatomite is added to the nitric acid solution , configured into a slurry with a mass concentration of 40%, and obtained pre-modified diatomite by boiling, cooling, suction filtration, washing, drying, and roasting. The boiling temperature is 85°C, the drying temperature is 95°C, and the drying temperature is 14 hours. 450°C, the calcination time is 14h, after the calcination, the required pre-modified diatomite is obtained; the pre-modified diatomite is modified twice with the mass ratio of 25% ferric nitrate, and the pre-modified silicon The diatomite is added to the ferric nitrate solution to form a slurry with a mass concentration of 40%, and then the secondary modified diatomite is obtained by drying and roa...
Embodiment 3
[0090] Preparation of Modified Diatomite
[0091] The commercially available diatomite is modified once with a nitric acid solution of PH=0.2, and the pre-modified diatomite is obtained by boiling, cooling, suction filtration, washing, drying, roasting, etc., and the diatomite is added to the nitric acid solution , configured into a slurry with a mass concentration of 45%, and obtained pre-modified diatomite by boiling, cooling, suction filtration, washing, drying, and roasting. The boiling temperature is 85°C, the drying temperature is 95°C, and the drying temperature is 13 hours. 485°C, the calcination time is 13h, and after the calcination, the required pre-modified diatomite is obtained; the pre-modified diatomite is modified twice with ferric nitrate with a mass ratio of 26%, and the pre-modified silicon The diatomaceous earth is added to the ferric nitrate solution to prepare a slurry with a mass concentration of 45%. After drying and roasting, the secondary modified dia...
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