| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a novel extractant for palladium capable of improving an extraction rate compared to the conventional extractant, DHS, and also capable of back-extracting palladium using an ammonia solution, and to provide a method of separating and recovering palladium using the novel extractant. <P>SOLUTION: An aqueous solution containing palladium is obtained by: bringing an acidic aqueous solution containing at least palladium into contact with an organic phase composed of an extractant containing a sulfide-containing monoamide compound as an active integredient represented by the following structural formula (I), where R<SB>1</SB>, R<SB>2</SB>, and R<SB>3</SB>each represent a group selected from among a chain hydrocarbon group having 1 to 18 carbon atoms which may be branched, an alicyclic hydrocarbon group having 1 to 10 carbon atoms, and an aromatic hydrocarbon group having 1 to 14 carbon atoms, and n represents an integer of 1 to 4; extracting palladium into the organic phase; and conducting the back-extraction of the palladium extracted in the organic phase to an aqueous solution using an ammonia solution. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
