Thermodynamics of Solvent Extraction of Thallium(Ⅰ) with Di(2-ethylhexyl)dithiophosphoric Acid

• 来源期刊: 中国化学(英文版)
• 年，卷（期）: 2005,（5）
• 页码范围: 567-570
• 页数: 4页
• 语种: 英文

摘要

In Tl2SO4+Na2SO4+di(2-ethylhexyl)dithiophosphoric acid+n-C8H18+water system, the Tl+ equilibrium molalities were measured at ionic strength from 0.1 to 2.0 mol·kg-1 containing Na2SO4 as supporting electrolyte in aqueous phase and at constant molality of extractant at temperatures from 278.15 to 303.15 K in organic phase. The standard extraction constants K0 at various temperatures were obtained by methods of extrapolation and polynomial approximation. Thermodynamic quantities for the extraction process were calculated.