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Separation of palladium by solvent extraction with methylamino-bis-$$N,N$$-dioctylacetamide and direct electrodeposition from loaded organic phase

メチルイミノ-ジオクチルアセトアミドによるPdの溶媒抽出と有機相からの金属析出

松宮 正彦*; Song, Y.*; 土田 裕介*; 佐々木 祐二  

Matsumiya, Masahiko*; Song, Y.*; Tsuchida, Yusuke*; Sasaki, Yuji

溶媒抽出と沈殿回収の開発は2次廃棄物低減に重要である。ここでは、メチルイミノ-ジオクチルアセトアミドを用いてアセトフェノン,ジクロロエタン,オクタノール中に抽出したPdの有機溶媒からの直接沈殿を調べた。その結果、Pdは-2.38から-3.4Vの間での0価への還元が見られ、黒色沈殿として回収できた。

The development of solvent extraction and direct electrodeposition processes is an important task to reduce the volume of secondary wastes. In this study, the extraction of Pd(II) from hydrochloric/chloride media using methylimino-bis-$$N,N$$-dioctylacetamide (MIDOA) in three diluents (acetophenone; AP, 1,2-dichloroethane; DCE, or 1-octanol; OC) and the electrochemical behavior of the extracted Pd(II) complex in the MIDOA/AP bath was investigated. Pd(II) was found to be reduced to Pd(0) metal via a two-electron transfer between -2.38 V and -3.40 V. The potentiostatic electrodeposition of the extracted Pd(II) complex enabled us to recover the blackish electrodeposits, which were identified as Pd metal.

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パーセンタイル:63.11

分野:Engineering, Chemical

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