In the studies of extraction of gold, most systems are those with oxo neutral extractants. Formerly, we reported the work on the extractions of gold with the extractants containing C=O, S=O and P=O. Recently, aromatic...In the studies of extraction of gold, most systems are those with oxo neutral extractants. Formerly, we reported the work on the extractions of gold with the extractants containing C=O, S=O and P=O. Recently, aromatic amine oxide was used to extract gold and platinum metals and to synthesize solid coordination compound of gold, but, so far, no report has been published on the extraction and separation of gold with aliphatic nitrogen oxide such as TOAO. So it will be mean-展开更多
Tertiary amines dissolved in diluents are attractive extractants for recovery of carboxylic acids from dilute aqueous solutions. Quantitative Fourier transform infrared (FTIR) analysis of organic solutions containin...Tertiary amines dissolved in diluents are attractive extractants for recovery of carboxylic acids from dilute aqueous solutions. Quantitative Fourier transform infrared (FTIR) analysis of organic solutions containing various concentrations of trioctylamine (TOA), n octanol, and propionic acid was carried out, and liquid liquid equilibrium was investigated using TOA in n octanol as the solvent. The fraction of ion pair association between TOA and propionic acid in the organic phase was quantitatively determined by FTIR. The apparent reactive extraction equilibrium constant, K 11 , was calculated using the quantitative FTIR spectrum and the equilibrium data. The results show that the fraction of ion pair association depends on diluent concentration, complex dissolution for propionic acid, and association between TOA and propionic acid. The K 11 based on quantitative FTIR has the same loading trend as that from the equilibrium data.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘In the studies of extraction of gold, most systems are those with oxo neutral extractants. Formerly, we reported the work on the extractions of gold with the extractants containing C=O, S=O and P=O. Recently, aromatic amine oxide was used to extract gold and platinum metals and to synthesize solid coordination compound of gold, but, so far, no report has been published on the extraction and separation of gold with aliphatic nitrogen oxide such as TOAO. So it will be mean-
基金the National Natural Science Foundationof China(No. 2 9836 130 )
文摘Tertiary amines dissolved in diluents are attractive extractants for recovery of carboxylic acids from dilute aqueous solutions. Quantitative Fourier transform infrared (FTIR) analysis of organic solutions containing various concentrations of trioctylamine (TOA), n octanol, and propionic acid was carried out, and liquid liquid equilibrium was investigated using TOA in n octanol as the solvent. The fraction of ion pair association between TOA and propionic acid in the organic phase was quantitatively determined by FTIR. The apparent reactive extraction equilibrium constant, K 11 , was calculated using the quantitative FTIR spectrum and the equilibrium data. The results show that the fraction of ion pair association depends on diluent concentration, complex dissolution for propionic acid, and association between TOA and propionic acid. The K 11 based on quantitative FTIR has the same loading trend as that from the equilibrium data.
