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化学学报
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化学学报 ›› 1992, Vol. 50 ›› Issue (7): 625-631.    下一篇

研究论文

金属的溶剂萃取热力学研究 2:In~2(SO~4)~3+Na~2SO~4+D~2EHMTPA+n-C~8H~18+H~2O体系

刘兴芝;杨家振;宋玉林;康艳红   

  1. 辽宁大学化学系
  • 发布日期:1992-07-15

Studies on the thermodynamics of the solvent extraction of metal.2. In~2(SO~4)~3+Na~2SO~4+D~2EHMTPA+n-C~8H~18+H~2O

LIU XINGZHI;YANG JIAZHEN;SONG YULIN;KANG YANHONG   

  • Published:1992-07-15

PDF

526

被引次数

7

在温度278.15-303.15K和离子强度=为0.1-2.0mol/kg范围内,在萃取体系In~2(SO~4)~3+Na~2SO~4+D~2EHMTPA+n-C~8H~18+H~2O体系中,本文测定了萃取平衡的In^3+的平衡浓度和水相pH值,其中Na~2SO~4为支持电解质.根据Pitzer电解质溶液理论,估算了平衡水相中的真实离子强度值,并用直线外推法和多项式拟合法确定了萃取过程的热力学平衡常数K^ ,进而计算了这个萃取过程的各个热力学量.

关键词: 热力学性质, 萃取剂, 溶剂萃取, 硫代磷酸 P, 硫酸钠, 辛烷, 硫酸铟, 热力学常数

Equilibrium was studied in the system In2(SO4)3 - Na2SO4 - D2EHMTPA - octane - water at ionic strengths 1.0-2.0 mol/kg in aqueous phase containing the supporting electrolyte Na2SO4 at temps. between 278.15 and 303.15 K and with a constant original molality of extractant in the organic phase. The standard extration constants were determine and the thermodn. functions were calculated

Key words: THERMODYNAMIC PROPERTIES, EXTRACTIVE AGENT, SOLVENT EXTRACTION, PHOSPHOROTHIOIC ACID P, SODIUM SULFATE, OCTANE, INDIUM SULFATE

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