非線形現象　　５，５‐ジフェニル‐２，４‐イミダゾリジンジオンによる銀の溶媒抽出

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  • Nonlinear Phenomena. Solvent Extraction of Silver with 5,5-Diphenyl-2,4-Imidazolidinedione.
  • 5 5 ジフェニル 2 4 イミダゾリジンジオン ニ ヨル ギン ノ ヨウバイ チュウシュツ

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Solvent extraction of silver using 5, 5-Diphenyl-2, 4-Imidazolidinedione as an extractant is investigated. It is found that the distribution ratio was second order dependent on both of extractant and silver (I) ion concentration as well as inversely dependent on hydrogen ion, suggesting that silver (I) ion is extracted as binuclear complex, Ag2R2. The extraction equilibrium constant K is evaluated as 2.0 × 10-5 [dm3/mol]. Stripping of loaded silver is nearly completely accomplished by 0.1 mol/dm3-nitric acid. Silver was selectively extracted over thallium (I), nickel (II), copper (II), and even over palladium (II).

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