Mechanism of extraction of Fe (III) from sulphate solution by primary amine N1923 and stripping of Fe loaded organic phase with dilute H_2SO_4 was investigated. The organic phase was characterized by FT-IR and photon ...Mechanism of extraction of Fe (III) from sulphate solution by primary amine N1923 and stripping of Fe loaded organic phase with dilute H_2SO_4 was investigated. The organic phase was characterized by FT-IR and photon correlation spectroscopy. The composition of extracted species as well as the content of H_2O in organic phase were determined. The dependence of both the rate of extraction and stripping on the formation of reverse micelle in primary amine (N1923)system has been confirmed. It is shown that the extraction of Fe(III) by primary amine sulphate may be related to the adduct formation or cation exchange reaction under different concentrations of H_2SO_4 in aqueous solution.展开更多
The extraction of lactic acid(HA) with primary amine N1923(RNH 2) has been studied by means of a slope method and IR spectrophotometry at (298±1) K. The composition of the extracted complex was found to be RNH 2H...The extraction of lactic acid(HA) with primary amine N1923(RNH 2) has been studied by means of a slope method and IR spectrophotometry at (298±1) K. The composition of the extracted complex was found to be RNH 2HA. The equilibrium constant of extraction was determined as lg K ex = 1 63. The results showed that lower temperature was favorable for the extraction.展开更多
The interfacial properties of extractants (or surfactants) such as primary amine N 1923 ,trioctylamine (TOA), Tri n octylphosphine Oxide (TOPO),tributyl phosphate(TBP) and sodium dodecyle sulphonate (SDS),were studied...The interfacial properties of extractants (or surfactants) such as primary amine N 1923 ,trioctylamine (TOA), Tri n octylphosphine Oxide (TOPO),tributyl phosphate(TBP) and sodium dodecyle sulphonate (SDS),were studied at (294±1)K.The interfacial adsorption parameters, c min , A I,were calculated respectively.The effect of additives on the interfacial tensions were discussed.These results could be used to explain and assume the extraction rate or mechanism.展开更多
文摘Mechanism of extraction of Fe (III) from sulphate solution by primary amine N1923 and stripping of Fe loaded organic phase with dilute H_2SO_4 was investigated. The organic phase was characterized by FT-IR and photon correlation spectroscopy. The composition of extracted species as well as the content of H_2O in organic phase were determined. The dependence of both the rate of extraction and stripping on the formation of reverse micelle in primary amine (N1923)system has been confirmed. It is shown that the extraction of Fe(III) by primary amine sulphate may be related to the adduct formation or cation exchange reaction under different concentrations of H_2SO_4 in aqueous solution.
文摘The extraction of lactic acid(HA) with primary amine N1923(RNH 2) has been studied by means of a slope method and IR spectrophotometry at (298±1) K. The composition of the extracted complex was found to be RNH 2HA. The equilibrium constant of extraction was determined as lg K ex = 1 63. The results showed that lower temperature was favorable for the extraction.
文摘The interfacial properties of extractants (or surfactants) such as primary amine N 1923 ,trioctylamine (TOA), Tri n octylphosphine Oxide (TOPO),tributyl phosphate(TBP) and sodium dodecyle sulphonate (SDS),were studied at (294±1)K.The interfacial adsorption parameters, c min , A I,were calculated respectively.The effect of additives on the interfacial tensions were discussed.These results could be used to explain and assume the extraction rate or mechanism.
