Continuous preparation process of high purity nanometer alumina
A nano-alumina, preparation technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of unstable product quality and low product purity, achieve the effect of improving conversion rate, overcoming low product purity, and ensuring uniformity
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Embodiment 1
[0022] Press the aluminum trichloride, hydrogen, and air to 5.5m 3 / h, 9.0m 3 / h、23.0m 3 The flow rate of / h (standard volume) is input to the premixer, and the reaction is carried out according to the above process. The temperature at the bottom of the reaction chamber (the entrance of the accumulator) is 950℃, the temperature in the first half of the accumulator is 950~600℃, and the temperature in the second half is 600~ 300°C. The temperature of the dechlorination tower is 350~500℃. The obtained nano alumina indicators are as follows:
[0023] Alumina content (%) 99.85 (atomic absorption spectrophotometer method)
[0024] Average particle size of primary particles (nm) 30 (electron microscope statistical method)
[0025] Chlorine content (%) 0.012 (potentiometric titration)
Embodiment 2
[0027] Press the aluminum trichloride, hydrogen, and air to 5.5m 3 / h、10m 3 / h、28m 3 The flow rate of / h (standard volume) is input to the premixer, and the reaction is carried out according to the above process. The temperature at the bottom of the reaction chamber (at the entrance of the accumulator) is 800℃, the temperature in the first half of the accumulator is 800~550℃, and the temperature in the second half is 550~ 300°C. The temperature of the dechlorination tower is 350~500℃. The obtained nano alumina indicators are as follows:
[0028] Alumina content (%) 99.90 (atomic absorption spectrophotometer method)
[0029] Average particle size of primary particles (nm) 12 (electron microscope statistical method)
[0030] Chlorine content (%) 0.018 (potentiometric titration).
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