A regeneration method for p507 extraction and separation of rare earth organic phase emulsion
A rare earth organic and organic phase technology, applied in the direction of improving process efficiency, can solve the problems of polluting the environment, wasting rare earth resources, etc., and achieve the effects of high recovery rate, simple and easy process, and low price
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Embodiment 1
[0010] In a 1000L reaction pot, add 200kg of P507 organic phase emulsion and 150L of sodium hydroxide solution with a concentration of 6mol / L and a temperature of 95°C in sequence, stir and react for 8min, then stand still for 20min, and separate layers; the upper layer is a clear organic phase. phase, the middle layer is a transparent water phase, and the lower layer is a precipitate containing rare earth hydroxide. The water phase and sediment are released from the bottom of the reaction pot for recovery of rare earths. The upper organic phase is a regenerated P507 organic phase, which can be directly used for the extraction and separation of rare earths. The recovery rate of P507 organic phase was 99.5%.
[0011] The aqueous phase and precipitate that drained from the bottom of the reaction pot were filtered. The filtrate is sodium hydroxide solution, which is neutralized to pH ≈ 7 with hydrochloric acid solution and discharged. The precipitate is washed with deionized w...
Embodiment 2
[0013] In a 1000L reaction pot, add 200kg of P507 organic phase emulsion and 150L of sodium hydroxide solution with a concentration of 8mol / L and a temperature of 100°C in sequence, stir and react for 5min, then stand still for 30min, and separate layers; the upper layer is a clear organic phase. phase, the middle layer is a transparent water phase, and the lower layer is a precipitate containing rare earth hydroxide. The water phase and sediment are released from the bottom of the reaction pot for recovery of rare earths. The upper organic phase is a regenerated P507 organic phase, which can be directly used for the extraction and separation of rare earths. The recovery of the P507 organic phase was 100%.
[0014] The aqueous phase and precipitate that drained from the bottom of the reaction pot were filtered. The filtrate is sodium hydroxide solution, which is neutralized to pH ≈ 7 with hydrochloric acid solution and discharged. The precipitate is washed with deionized wa...
Embodiment 3
[0016] In a 1000L reaction pot, add 200kg of P507 organic phase emulsion and 150L of sodium hydroxide solution with a concentration of 4mol / L and a temperature of 90°C in sequence, stir and react for 10min, then stand still for 10min, and separate layers; the upper layer is a clear organic phase. phase, the middle layer is a transparent water phase, and the lower layer is a precipitate containing rare earth hydroxide. The water phase and sediment are released from the bottom of the reaction pot for recovery of rare earths. The upper organic phase is a regenerated P507 organic phase, which can be directly used for the extraction and separation of rare earths. The recovery of the P507 organic phase was 99%.
[0017] The aqueous phase and precipitate that drained from the bottom of the reaction pot were filtered. The filtrate is sodium hydroxide solution, which is neutralized to pH ≈ 7 with hydrochloric acid solution and discharged. The precipitate is washed with deionized wat...
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