The power time curves of the extraction oscillation reaction were determined at different temperatures for the extraction of hydrochloric acid and phosphoric acid by primary amine N1923 in chloroform, using a titratio...The power time curves of the extraction oscillation reaction were determined at different temperatures for the extraction of hydrochloric acid and phosphoric acid by primary amine N1923 in chloroform, using a titration microcalorimetric method. The apparent activation energy were calculated from the induction period( t in ), the first oscillation period( t p.1 ) and the second oscillation period( t p.2 ). The oscillation behavior were discussed.展开更多
Complexation extraction of p-aminophenol（PAP） with bis（2-ethylhexyl）phosphoric acid（P204）,tri-octylamine（TOA） or tri-butyl phosphate（TBP） was studied.The heat of reaction for each extraction was respectively...Complexation extraction of p-aminophenol（PAP） with bis（2-ethylhexyl）phosphoric acid（P204）,tri-octylamine（TOA） or tri-butyl phosphate（TBP） was studied.The heat of reaction for each extraction was respectively-9.20 kJ/mol,-5.57 kJ/mol,-3.47 kJ/mol.FTIR analysis of the organic phases showed that the extraction mechanism depended on the complexing agent.Lewis acidic complexing agent P204 and Lewis alkaline complexing agent TOA with alkaline functional group —NH2 and acidic functional group —OH of PAP respectively form complexes via ionic association,and neutral complexing agents TBP and TOA with group —OH of PAP via hydrogenbond association.A relationship between the extraction（reaction） enthalpy and the extraction mechanism was found.展开更多
文摘The power time curves of the extraction oscillation reaction were determined at different temperatures for the extraction of hydrochloric acid and phosphoric acid by primary amine N1923 in chloroform, using a titration microcalorimetric method. The apparent activation energy were calculated from the induction period( t in ), the first oscillation period( t p.1 ) and the second oscillation period( t p.2 ). The oscillation behavior were discussed.
文摘Complexation extraction of p-aminophenol（PAP） with bis（2-ethylhexyl）phosphoric acid（P204）,tri-octylamine（TOA） or tri-butyl phosphate（TBP） was studied.The heat of reaction for each extraction was respectively-9.20 kJ/mol,-5.57 kJ/mol,-3.47 kJ/mol.FTIR analysis of the organic phases showed that the extraction mechanism depended on the complexing agent.Lewis acidic complexing agent P204 and Lewis alkaline complexing agent TOA with alkaline functional group —NH2 and acidic functional group —OH of PAP respectively form complexes via ionic association,and neutral complexing agents TBP and TOA with group —OH of PAP via hydrogenbond association.A relationship between the extraction（reaction） enthalpy and the extraction mechanism was found.
