In this work,liquid-liquid extraction of phenol from aqueous solutions using primary amine Primene JMT(Primene®JM-T)was investigated.The extraction capability of Primene®JM-T with different diluents,includin...In this work,liquid-liquid extraction of phenol from aqueous solutions using primary amine Primene JMT(Primene®JM-T)was investigated.The extraction capability of Primene®JM-T with different diluents,including 3-heptanone,sulfonated kerosene,methyl isobutyl ketone,n-octanol,toluene and petroleum ether was studied.The experimental results indicated that the distribution coefficient of phenol extracted using Primene®JM-T that was diluted in 3-heptanone could reach 101.74 under the pH of 9.2.Moreover,the extraction reaction was exothermic(enthalpy change for the extraction reaction(DrHm)was21.03 kJ/mol).High temperature showed a negative effect on the extraction of phenol.The results also showed that adding mineral salt was conducive to the extraction process,and the extraction effi-ciency fell in the descending order of:(NH_(4))_(2)SO_(4)>NaCl>NH_(4)Cl.Two empirical correlations were put forward to quantitatively describe the salting effect.Furthermore,the equilibrium constants of phenol extraction using Primene®JM-T were calculated to be 78.2 L/mol.The phenol was extracted using Primene®JM-T with the possible stoichiometric formula of:[RNH_(3)^(+),PhOH]_(org),where R represents the alkyl group of the amine.展开更多
基金the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA21021102).
文摘In this work,liquid-liquid extraction of phenol from aqueous solutions using primary amine Primene JMT(Primene®JM-T)was investigated.The extraction capability of Primene®JM-T with different diluents,including 3-heptanone,sulfonated kerosene,methyl isobutyl ketone,n-octanol,toluene and petroleum ether was studied.The experimental results indicated that the distribution coefficient of phenol extracted using Primene®JM-T that was diluted in 3-heptanone could reach 101.74 under the pH of 9.2.Moreover,the extraction reaction was exothermic(enthalpy change for the extraction reaction(DrHm)was21.03 kJ/mol).High temperature showed a negative effect on the extraction of phenol.The results also showed that adding mineral salt was conducive to the extraction process,and the extraction effi-ciency fell in the descending order of:(NH_(4))_(2)SO_(4)>NaCl>NH_(4)Cl.Two empirical correlations were put forward to quantitatively describe the salting effect.Furthermore,the equilibrium constants of phenol extraction using Primene®JM-T were calculated to be 78.2 L/mol.The phenol was extracted using Primene®JM-T with the possible stoichiometric formula of:[RNH_(3)^(+),PhOH]_(org),where R represents the alkyl group of the amine.
