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›› 2005, Vol. 5 ›› Issue (1): 29-31.

• 反应与分离 • 上一篇    下一篇

N8161 萃取铼(Ⅶ)的热力学

房大维,王淑坤,刘兴芝,赵迪,臧树良   

  1. 辽宁大学化学科学与工程学院
  • 出版日期:2005-01-20 发布日期:2005-01-20

Thermodynamics of Solvent Extraction of Re(VII) with N8161

FANG Da-wei,WANG Shu-kun,LIU Xing-zhi,ZHAO Di,ZANG Shu-liang   

  1. Inst. Chem. Sci. & Eng., Research Inst. Rare & Scattered Elements, Liaoning Univ.
  • Online:2005-01-20 Published:2005-01-20

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摘要： 以萃取剂N8161、稀释剂正庚烷研究了萃取铼的热力学. 在N8161 (NH4)ReO4 n C7H16 HCl H2O体系中，在温度278.15~298.15 K和离子强度0.1~2.0 mol/kg范围内，以NH4Cl为支持电解质，在HCl体系中测定了萃取平衡水相中的ReO4 浓度和pH值. 计算了萃取反应的标准平衡常数K0，并得到经验公式logK0 23.0353 4330.282T 1 0.04831T, 同时计算了萃取反应的其它热力学量，指出焓和熵是该萃取过程的推动力.

关键词: 萃取, 高铼酸铵, N8161, 热力学, 平衡常数

Abstract: This paper reported the thermodynamics of extracting Re(VII) with the extractant of N8161 in the HCl system. The equilibrium molalities of ReO4 in the extraction: N8161(org) H (aq) ReO4 (aq) H N8161ReO4 (org) were measured at ionic strength values from 0.1 to 2.0 mol/kg in the aqueous phase containing NH4Cl as the supporting electrolyte and at constant initial molality of extractant in the organic phase at the temperatures from 278.15 to 298.15 K. The standard equilibrium constant K0 at various temperatures was obtained, and the thermodynamic variations for the extraction process were calculated.

Key words: extraction, ammonium perrhenate, N8161, thermodynamics, equilibrium constant