Preparation method for obtaining high-purity praseodymium oxide and neodymium oxide through single-factor separation of praseodymium-neodymium enriched product
A technology of enrichment and praseodymium oxide, which is applied in the direction of improving process efficiency, etc., can solve the problems of difficulty in obtaining high-purity neodymium and high-purity praseodymium, low separation coefficient of praseodymium and neodymium, and difficult control of praseodymium and neodymium, so as to achieve good product quality , Product quality is stable, the effect of less impurities
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Embodiment 1
[0038] (1) Dissolve the light rare earth whose main components are lanthanum, cerium, praseodymium and neodymium in hydrochloric acid, remove the insoluble particles, the remaining solution mainly contains rare earth chloride solution, add sodium carbonate to the feed solution to pH 12, and form rare earth Precipitation, after solid-liquid separation, a large amount of non-rare earth impurities are discharged from the mother liquor, and the precipitate is mixed with hydrochloric acid to keep the pH at 3 to 4 to obtain a rare earth chloride solution, in which the rare earth concentration is La 15.0g / L and Ce 40.0g / L , Pr 10.0g / L, Nd 28.0g / L.
[0039] (2) With octanol, naphthenic acid, sulfonated kerosene mass ratio 1:1:2 mixture is organic phase, saponification, saponification value 0.52, feed liquid and organic phase after saponification are added in the first extraction tank, organic phase, The volume flow ratio of the enriched material liquid of lanthanum, cerium, praseodymi...
Embodiment 2
[0045] (1) Dissolving the light rare earth whose main components are lanthanum, cerium, praseodymium and neodymium in hydrochloric acid to remove insoluble particles, the remaining solution mainly contains rare earth ion chloride solution, and sodium carbonate is added to the feed solution to pH 12 to form rare earth Precipitation, after solid-liquid separation, a large amount of non-rare earth impurities are discharged from the mother liquor, the precipitate is mixed with hydrochloric acid, and the pH is kept at 3 to 4 to obtain a rare earth chloride solution, in which the rare earth concentration La 24.0g / L, Ce 27.0g / L , Pr 20.0g / L, Nd45.0g / L.
[0046] (2) With octanol, naphthenic acid, sulfonated kerosene mass ratio 0.8:1:1.8 mixture is organic phase, saponification value 0.52, feed liquid and organic phase are added in the first extraction tank, organic phase, lanthanum cerium praseodymium neodymium The volume flow ratio of the enriched material liquid is 3.8:1, the water ...
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