Thermodynamic Studies on the Solvent Extraction of Europium Nitrate into Versatic Acid 911-Benzene Solution

• Shigematsu Tatsuhiko

  Graduate School, Kyoto University

• Tanabe Teruo

  Department of Metallurgy, Kyoto University

• Nishimura Sanji

  Department of Chemical Engineering, Kansai University

• Kondo Yoshio

  Department of Metallurgy, Kyoto University

抄録

The extraction equilibrium of Eu(NO₃)₃ from aqueous solution into Versatic acid 911-benzene solution was studied. The vapor pressure of benzene in this binary organic solution was measured by the transpiration method at 15, 25 and 35°C. And the activity coefficient of Versatic acid 911 in this solution was calculated by the Gibbs-Duhem equation.<BR>On the other hand, the distribution equilibrium of Eu³⁺ ion between aqueous and organic solutions was measured at the above-mentioned temperatures by using a mixture of Eu¹⁵² and Eu¹⁵⁴ as the radioactive tracer. The composition of extracted species and the equilibrium constant of extraction were determined by taking the calculated values of activity of Versatic acid 911 into consideration. Furthermore, enthalpy and entropy changes of the extraction were calculated in the following way:<BR>Extracted species: EuR₃·4RH<BR>ΔH°=15.4(kcal/mol) ΔS°=37.8(e.u.)

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 14 (6), 496-503, 1973

  社団法人 日本金属学会

キーワード

• General Engineering

詳細情報

• CRID: 1390282680093436032
• NII論文ID: 130003485257
• DOI: 10.2320/matertrans1960.14.496
• COI: 1:CAS:528:DyaE2cXnsVOhsw%3D%3D
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/14/6/14_6_496/_pdf
• 本文言語コード: en
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