THE SELECTIVE EXTRACTION OF RARE EARTHS FROM ACIDIC AQUEOUS SOLUTIONS BY A MONOAMIDE

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The invention relates to the use of N, N-butylacetamide as an extractant to extract at least one rare earth of an acidic aqueous phase. The invention further relates to a method for liquid-liquid extraction of at least one rare earth of an acidic aqueous phase, which includes at least one contacting the acidic aqueous phase with an organic phase which is immiscible with water and comprising at least one extractant, and then separating the acidic aqueous phase from the organic phase, and which is characterized in that the extractant is n, the n-dibutylacetamide. it also relates to a method for recovering at least one rare earth from an acidic aqueous phase, which implements this extraction method. Application : for producing rare earths from natural ore concentrates and city, in particular, recycling of rare earth permanent magnets contained in the neodymium iron boron, used or rejected.