Method for extracting and separating beryllium
An extraction and ion technology, applied in the field of extraction and separation of beryllium, can solve the problems of inability to remove aluminum, many extraction stages, and poor aluminum removal effect, and achieve high beryllium recovery rate, good separation effect, and few extraction stages
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Embodiment 1
[0012] The beryllium-containing feed liquid of a low-grade compound ore has a main component content of Be 5g / L, Fe 9g / L, and Al 3g / L. Mix the organic phase with a volume ratio of 15% naphthenic acid-15% octanol-70% kerosene with the beryllium-containing feed solution at O:A=3:1, and add dropwise a concentration of 0.6mol / L ammonia water to the pH during stirring =5.2, stop stirring, leave to stand for stratification, analyze and record that Be is 0.05g / L in the aqueous phase, and the beryllium extraction rate reaches 99% through calculation; drain the aqueous phase, then press the organic phase and sulfuric acid solution O: A=0.15: 1. Re-extract the organic phase with a sulfuric acid solution with a concentration of 0.6 mol / L. After mixing evenly, stop stirring, let it stand for stratification, and discharge the water phase; finally, the organic phase and sodium hydroxide solution O:A=0.13:1 , use a sodium hydroxide solution with a concentration of 2.8mol / L to back-extract th...
Embodiment 2
[0014] With embodiment 1, organic phase volume ratio is 25% naphthenic acid-25% isooctyl alcohol-50% kerosene, organic phase is mixed with beryllium-containing material liquid O: A=5: 1, and dropwise concentration in stirring process is 6mol / L sodium hydroxide solution to pH = 7.5, stop stirring, let stand to separate layers, analyze and measure the Be in the water phase to be 0.02g / L, and calculate the beryllium extraction rate to be higher than 99%. Drain the water phase, then according to the organic phase and hydrochloric acid solution O: A=5: 1, add the hydrochloric acid solution with a concentration of 5mol / L into the organic phase, after mixing evenly, stop stirring, leave to stand for stratification, and discharge the water phase; finally press The organic phase and the sodium hydroxide solution are O:A=5:1, and the organic phase is back-extracted with a sodium hydroxide solution with a concentration of 6mol / L. After mixing evenly, stop stirring, leave to stand for stra...
Embodiment 3
[0016] The beryllium-containing feed liquid of a low-grade composite ore has a composition content of Be 2g / L, Fe 5g / L, and Al 6g / L. The volume ratio is that the organic phase of 25% naphthenic acid-15% octanol-60% kerosene is mixed with the beryllium-containing material liquid by O: A=0.6: 1, and the concentration is added dropwise in the stirring process to be 3mol / L sodium carbonate solution to pH=6.0, stop stirring, stand and separate layers, analyze and measure Be in the aqueous phase to be 0.01g / L, beryllium extraction rate reaches 99.5% through calculation, drain the aqueous phase; then press the organic phase and sulfuric acid solution according to O: A= 2:1, back-extract the organic phase with a sulfuric acid solution with a concentration of 3mol / L, after mixing evenly, stop stirring, let stand to separate, and discharge the water phase; finally, according to the organic phase and ammonium carbonate aqueous solution O:A=2:1, Back-extract the organic phase with an aque...
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