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RE-EXTRACTION METHOD OF RARE-EARTH METALS FROM ORGANIC SOLUTIONS AND OBTAINMENT OF CONCENTRATE FROM

2025-07-30 02:052020下载
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FIELD : metallurgy. SUBSTANCE : invention refers to liquid extraction processes, in particular to obtainment of rear-earth metals concentrates, in non-ferrous and ferrous metallurgy, during utilisation of chemical and metallurgical production waste and for purification of shaft, mine and industrial waste water. The method of rear-earth metals removal from diluted water acid solutions involves consecutive steps of liquid-phase extraction of rear-earth metals to organic phase and re-extraction of rear-earth metals from organic phase by settlement of rear-earth metals to solid phase in the form of slightly soluble salt of strong acid. EFFECT : providing efficient removal of rear-earth metals without neutralising of acid containing in organic phase and use of cheap commercially available reagents. 7 cl, 6 ex


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