Purification method of rare earth oxide and prepared product
A technology of rare earth oxides and purification methods, applied in the field of hydrometallurgy, can solve the problems of increased energy consumption of rare earth materials, restrictions on the effective use and development of rare earth materials, and achieve the effects of reducing energy consumption, improving purity, and simplifying the process flow
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Embodiment 1
[0028] Take a 0.15 mol / l rare earth-containing solution, wherein the sulfate ion content is 1.5 mol / l. At 75°C, add a certain amount of polyethylene glycol dispersant, and under the stirring condition of 200r / min, continuously add oxalate precipitant to the reactor according to the molar ratio of rare earth ion to precipitant is 1:2, At the same time, continuously use ammonia water to adjust the pH value of the system, so that the pH value of the reaction system is maintained at about 3. Then, the mixture was continuously stirred for 90 minutes at a stirring speed of 150 r / min, and aged for 60 minutes at a temperature of 75° C. after the reaction was completed. The obtained precipitated system was subjected to suction filtration, during which water and ethanol were used to wash 3 times and 5 times respectively. The obtained samples were placed in a drying oven and dried at 100 °C for 300 min. The dried sample was placed in a corundum crucible, roasted in a muffle furnace at ...
Embodiment 2
[0030] Take a 0.15 mol / l rare earth-containing solution, wherein the sulfate ion content is 1.5 mol / l. At 90°C, add a certain amount of polyethylene glycol dispersant, and under the stirring condition of 200r / min, continuously add oxalate precipitant to the reactor according to the molar ratio of rare earth ion to precipitant is 1:2, At the same time, continuously use ammonia water to adjust the pH value of the system, so that the pH value of the reaction system is maintained at about 2. Then, the mixture was continuously stirred for 60 minutes at a stirring speed of 100 r / min, and aged at 90° C. for 60 minutes after the reaction was completed. The obtained precipitated system was subjected to suction filtration, during which water and ethanol were used to wash 3 times and 5 times respectively. The obtained samples were placed in a drying oven and dried at 100 °C for 300 min. The dried sample was placed in a corundum crucible, and roasted in a muffle furnace at 900°C for 300...
Embodiment 3
[0032]Take a 0.15 mol / l rare earth-containing solution, wherein the sulfate ion content is 0.75 mol / l. At 90°C, add a certain amount of polyethylene glycol dispersant, and under the stirring condition of 200r / min, continuously add oxalate precipitant to the reactor according to the molar ratio of rare earth ion to precipitant is 1:2, At the same time, continuously use ammonia water to adjust the pH value of the system, so that the pH value of the reaction system is maintained at about 1.5. Then, the mixture was continuously stirred for 60 minutes at a stirring speed of 100 r / min, and aged at 90° C. for 60 minutes after the reaction was completed. The obtained precipitation system was subjected to suction filtration, during which water and ethanol were used to wash 3 times and 5 times respectively. The obtained samples were placed in a drying oven and dried at 100 °C for 300 min. The dried sample was placed in a corundum crucible, roasted in a muffle furnace at 950°C for 300 ...
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