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METHOD FOR RECOVERING RARE EARTH BY FRACTIONAL EXTRACTION

2025-06-19 20:012950下载
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Disclosed is a method for recovering rare earth by fractional extraction. The method comprises the following steps : using a rare earth solution containing medium-heavy rare earth as a raw liquid with a pH value of 2.5-5.5, performing a first extraction on the raw liquid with a first organic phase of an acidic phosphorus extraction agent having a pKa value >4, while keeping the balanced acidity of the extraction aqueous phase in 1
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