Method for preparing anhydrous halogenated rare earth through vacuum microwave dehydration

[0018] Example 1

[0019] 800g of cerium chloride heptahydrate with a water content of 33% was placed in a ceramic container, and then the ceramic container was placed in a vacuum microwave drying oven. The radiation frequency of the microwave magnetron was 2450MHz and the output power was 2000W. The equipment was pumped. Vacuum treatment, the vacuum degree is maintained at -0.09MPa, the temperature range in the equipment is 80 °C for 20 minutes, rise to 150 °C for 40 minutes, and then rise to 250 °C for 60 minutes, after cooling, take out the material, anhydrous cerium chloride is added to the water quickly Dissolved, the dissolved aqueous solution is clear and transparent, the water content of anhydrous cerium chloride is 0.38% by detection and analysis, and the purity of anhydrous cerium chloride is greater than 99.5%.

[0020] Example 2

[0021] 3000g of neodymium chloride hexahydrate with a water content of 30% was placed in a ceramic container, and then the ceramic container was placed in a vacuum microwave drying oven. The radiation frequency of the microwave magnetron was 2450MHz and the output power was 6000W, and the equipment was pumped. Vacuum treatment, the vacuum degree is kept at -0.094MPa, the temperature range in the equipment is 80 °C for 10 minutes, rise to 150 °C for 30 minutes, and then rise to 240 °C for 100 minutes, after cooling, take out the material, anhydrous neodymium chloride is added to the water quickly Dissolved, the dissolved aqueous solution is clear and transparent, the water content of the anhydrous neodymium chloride is 0.35% by detection and analysis, and the purity of the anhydrous neodymium chloride is greater than 99.5%.

[0022] Example 3

[0023] Put 200g of lanthanum bromide heptahydrate with a water content of 25% in a ceramic container, and then put the ceramic container into a vacuum microwave drying oven. The radiation frequency of the microwave magnetron is 2450MHz and the output power is 1000W, and the equipment is pumped. Vacuum treatment, the vacuum degree is kept at -0.097MPa, the temperature range in the equipment is 60 °C for 5 minutes, rise to 130 °C for 5 minutes, then rise to 220 °C for 10 minutes, after cooling, take out the material, anhydrous lanthanum bromide is added to the water quickly Dissolved, the dissolved aqueous solution is clear and transparent, the water content of the anhydrous lanthanum bromide is 0.43% by detection and analysis, and the purity of the anhydrous lanthanum bromide is greater than 99.5%.