Extraction agent for precious metals and rhenium, and extraction method for precious metals and rhenium using same

摘要

The present invention extracts precious metals from an acidic solution containing precious metals in an early and highly efficient manner. Provided is an extraction agent for precious metals that is represented by the general formula below. In the formula, R1 and R2 each represent the same alkyl group or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom or a discretionary group that is not an amino group and that bonds to α carbon as an amino acid. By subjecting an acidic solution containing precious metals to solvent extraction using the extraction agent for precious metals, a plurality of precious metals can be recovered all at once from a solution containing a large amount of various impurities.;

主权项

1. An extraction method for metals, the method comprising subjecting an acid solution containing one or more metals selected from precious metals and rhenium to solvent extraction with a metal extraction agent to extract the one or more metals selected from the precious metals and the rhenium from the acid solution,
wherein the metal extraction agent that comprises an amide derivative represented by the following general formula (I): wherein, R1 and R2 each represent the same or different alkyl groups; the alkyl group can be a straight chain or a branched chain; R3 represents a hydrogen atom or an alkyl group; and R4 represents a hydrogen atom or any group other than an amino group, which is bound to the α carbon as an amino acid.