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Thermodynamics of Solvent Extraction of Thallium(I) with Di(2‐ethylhexyl)dithiophosphoric Acid
Author(s) -
XingZhi Liu,
DaWei Fang,
YanHong Kang,
Jun Li,
ShuLiang Zang
Publication year - 2005
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200590567
Subject(s) - chemistry , molality , ionic strength , extraction (chemistry) , aqueous two phase system , aqueous solution , thallium , activity coefficient , phase (matter) , extrapolation , electrolyte , solvent extraction , analytical chemistry (journal) , thermodynamics , inorganic chemistry , chromatography , organic chemistry , mathematical analysis , physics , mathematics , electrode
In Tl 2 SO 2 +Na 2 SO 4 +di(2‐ethylhexyl)dithiophosphoric acid+ n ‐C 8 H 18 +water system, the Tl + equilibrium molalities were measured at ionic strength from 0.1 to 2.0 mol·kg ‐1 containing Na 2 SO 4 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 K 0 at various temperatures were obtained by methods of extrapolation and polynomial approximation. Thermodynamic quantities for the extraction process were calculated.