METHOD FOR EXTRACTING METAL IONS USING A PHOSPHORIC ACID ACID ESTER AS AN EXTRACTING AGENT

摘要

A method for extracting metal ions by contacting an aqueous solution containing the metal ions with an acidic phosphoric acid ester, characterized in that as the acidic phosphoric acid ester, an acidic phosphoric acid ester of the formula: IMAGE (M) wherein R1 is an alkylphenyl group having from 7 to 18 carbon atoms and R2 is an alkyl group having from 1 to 18 carbon atoms, is used.