摘要
This paper reported the thermodynamics of extracting Re(VII) with theextractant of N816 (R_3N) in the H_2SO_4 system. The equilibrium molalities of ReO_4^- in theextraction R_3N (org) + H^+(aq) + ReO_4^- (aq) = R_3NHReO_4(org) were measured at ionic strengthsfrom 0.1 to 2.0 mol centre dot kg^(-1) in the aqueous phase containing Na_2SO_4 as the supportingelectrolyte and at constant initial molality of extractant in the organic phase at temperatures from278.15 to 303.15 K. The standard extraction constants .K^(theta) at various temperatures wereobtained. The working equation was obtained as 1g K^(theta) = 2.819 + 905.44/T-0.00349T.Thermodynamic parameters for the extraction process were calculated.
This paper reported the thermodynamics of extracting Re(VII) with theextractant of N816 (R_3N) in the H_2SO_4 system. The equilibrium molalities of ReO_4^- in theextraction R_3N (org) + H^+(aq) + ReO_4^- (aq) = R_3NHReO_4(org) were measured at ionic strengthsfrom 0.1 to 2.0 mol centre dot kg^(-1) in the aqueous phase containing Na_2SO_4 as the supportingelectrolyte and at constant initial molality of extractant in the organic phase at temperatures from278.15 to 303.15 K. The standard extraction constants .K^(theta) at various temperatures wereobtained. The working equation was obtained as 1g K^(theta) = 2.819 + 905.44/T-0.00349T.Thermodynamic parameters for the extraction process were calculated.
基金
ThisprojectwasfinanciallysupportedbytheResearchFundoftheDepartmentofEducationofLiaoningProvince,China(No.990121015)theNationalNaturalScienceFoundationofChina(No.20441005).
