Magnetic nano base metal fluoride load type solid base catalyst and preparation method thereof
A technology of alkali metal fluoride and solid alkali catalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve strong magnetism, uniform distribution, and good dispersion
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Embodiment 1
[0022] (1) Preparation and surface modification of magnetic substances
[0023] Weigh 2.7g (0.01mol) FeCl 3 ·6H 2O and 7.2g (0.045mol) of sodium acetate were dissolved in 80ml of ethylene glycol and stirred at room temperature until dissolved to form a uniformly dispersed solution. The resulting solution was transferred to a 100 ml autoclave, and then crystallized at 200° C. for 8 hours. The autoclave was taken out and naturally cooled to room temperature, and the obtained Fe 3 o 4 The suspension was washed three times successively with ethanol and deionized water (100 ml of ethanol each time, and 200 ml of deionized water each time). Use NdFeB permanent magnet to separate Fe during washing 3 o 4 solid. After washing, the obtained Fe 3 o 4 The solid was dispersed in ethanol for storage. The Fe obtained by the above steps 3 o 4 The particle size is 150nm, and the specific saturation magnetization σ s 87.9A·m 2 / kg.
[0024] Weigh 0.1g of the above Fe 3 o 4 Add ...
Embodiment 2
[0031] (1) Preparation and surface modification of magnetic substances
[0032] Weigh 2.7g (0.01mol) FeCl 3 ·6H 2 O and 7.2g (0.045mol) of sodium acetate were dissolved in 80ml of ethylene glycol and stirred at room temperature until dissolved to form a uniformly dispersed solution. The obtained solution was transferred to a 100 ml autoclave, and crystallized at 200° C. for 8 hours. The autoclave was taken out and naturally cooled to room temperature, and the obtained Fe 3 o 4 The suspension was washed three times successively with ethanol and deionized water (100 ml of ethanol each time, and 200 ml of deionized water each time). Use NdFeB permanent magnet to separate Fe during washing 3 o 4 solid. After washing, the obtained Fe 3 0 4 The solid was dispersed in ethanol for storage. The Fe obtained by the above steps 3 o 4 The particle size is 150nm, and the specific saturation magnetization σ s 80.5A·m 2 / kg.
[0033] Weigh 0.1g of the above Fe 3 o 4 Add the s...
Embodiment 3
[0040] (1) Preparation and surface modification of magnetic substances
[0041] Weigh 5.44g (0.02mol) FeCl 3 ·6H 2 O and 14.4g (0.09mol) of sodium acetate were dissolved in 160ml of ethylene glycol and stirred at room temperature until dissolved to form a uniformly dispersed solution. The resulting solution was transferred to a 200ml autoclave, and crystallized at 200°C for 8 hours. The autoclave was taken out and naturally cooled to room temperature, and the obtained Fe 3 o 4 The suspension was washed three times successively with ethanol and deionized water (100 ml of ethanol each time, and 200 ml of deionized water each time). Use NdFeB permanent magnet to separate Fe during washing 3 o 4 solid. After washing, the obtained Fe 3 o 4 The solid was dispersed in ethanol for storage. The Fe obtained by the above steps 3 o 4 The particle size is 140nm, and the specific saturation magnetization σ s 85.2A·m 2 / kg.
[0042] Weigh 0.1g of the above Fe 3 o 4 Add the s...
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