| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an extractant capable of mutually separating rare earth metals and an extractant capable of efficiently extracting light rare earth metals.SOLUTION: The provided amide derivative is expressed by the formula (1): [Rand Rexpress mutually identical or different branched alkyl groups; Rexpresses H or alkyl group; Rexpresses H or an arbitrary group other than amino group coupled, as amino acid, withαcarbon; the possession of a glycine unit, histidine unit, lysine unit, aspartic acid unit, or n-methylglycine unit is preferred]; in a case where valuable metals are extracted, the valuable metals can be selectively extracted by subjecting an acidic solution including the valuable metals and impurities to a solvent extraction using the amide derivative.</p> |
