Method for removing sulfate radicals in rare earth precipitates and products obtained by the method
A sediment and sulfate technology, applied in the direction of improving process efficiency, etc., can solve the problems of restricting the effective utilization and development of rare earth materials, increasing the energy consumption of rare earth materials, etc., and achieve the effects of reducing energy consumption, improving purity, and simplifying the process flow
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0031]The pretreated rare earth precipitate is prepared into a rare earth solution with a sulfate content of 0.75 mol / l. At 80°C, add a certain amount of ammonium sulfate dispersant, and under the stirring condition of 100r / min, continuously add oxalate precipitant to the reactor according to the molar ratio of rare earth ion to precipitant is 1:2, during the same time Constantly use ammonium salt to adjust the pH value of the system, so that the pH value of the reaction system is maintained at about 1.5. After adding the precipitant, ensure that the final pH value of the system is about 1.5, then continue to stir at a stirring speed of 100r / min for 30min, and age the reaction at 80°C for 60min after the reaction is 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. A certain amount of hydrochloric acid is used to dissolve the rare earth precipitate sample, the rar...
Embodiment 2
[0033] The pretreated rare earth precipitate is formulated into a rare earth-containing solution with a sulfate content of 1.5 mol / l. At 95°C, add a certain amount of ammonium sulfate 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 and precipitant at 1:2, during the same time Constantly use ammonium salt to adjust the pH value of the system, so that the pH value of the reaction system is maintained at about 3. After adding the precipitating agent, ensure that the final pH value of the system is about 3, and then continue to stir at a stirring speed of 100r / min for 90min. After the reaction is completed, the reaction is aged at 95°C for 180min. The obtained precipitated system was subjected to suction filtration, during which water and ethanol were used to wash 3 times and 5 times respectively. A certain amount of hydrochloric acid is used to dissolve the rare earth pre...
Embodiment 3
[0035] The pretreated rare earth precipitate is formulated into a rare earth solution containing 1.0 mol / l of sulfate. At 75°C, add a certain amount of ammonium sulfate 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 and precipitant at 1:2, during the same time Constantly use ammonium salt to adjust the pH value of the system to maintain the pH value of the reaction system at about 2. After adding the precipitating agent, ensure that the final pH value of the system is about 2, and then continue to stir at a stirring speed of 100r / min for 90min. After the reaction is completed, the reaction is aged at 75°C for 90min. The obtained precipitated system was subjected to suction filtration, during which water and ethanol were used to wash 3 times and 5 times respectively. A certain amount of hydrochloric acid is used to dissolve the rare earth precipitate sample, the rare e...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More