Extraction of Zr（IV） from hydrochloric acid with tri-octyl amine and Cyanex 921 in kerosene
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第9期
论文作者：Bhikari Charan Bhatta Nandita Panda Sujata Mishra
文章页码：823 - 828
摘 要：This article reports the extraction of zirconium（IV） from aqueous HCl solution by tri-octyl amine（TOA）,Cyanex 921,and their binary mixture using kerosene as the diluent.The efect of some parameters on the extraction of Zr（IV） was investigated such as equilibration time,aqueous phase acidity,extractant molarity,chloride ion concentration,nature of diluents,and temperature.The extraction of Zr（IV） was found to be 99% from 7.5 M HCl using the mixture of extractants containing 0.1 M TOA and 0.02 M Cyanex 921 in kerosene.Kerosene was found to be the efective diluent for the extraction of Zr（IV） with the binary mixture of TOA and Cyanex 921.The positive enthalpy change and positive entropy change in the binary extraction system show the endothermic process with an increase in entropy.Stripping of Zr（IV） from the loaded organic phase containing the mixture of TOA（0.1 M） and Cyanex 921（0.02 M） indicates that HNO3and Na2CO3are the best stripping agents.
Bhikari Charan Bhatta1，Nandita Panda2，Sujata Mishra2
摘 要：This article reports the extraction of zirconium（IV） from aqueous HCl solution by tri-octyl amine（TOA）,Cyanex 921,and their binary mixture using kerosene as the diluent.The efect of some parameters on the extraction of Zr（IV） was investigated such as equilibration time,aqueous phase acidity,extractant molarity,chloride ion concentration,nature of diluents,and temperature.The extraction of Zr（IV） was found to be 99% from 7.5 M HCl using the mixture of extractants containing 0.1 M TOA and 0.02 M Cyanex 921 in kerosene.Kerosene was found to be the efective diluent for the extraction of Zr（IV） with the binary mixture of TOA and Cyanex 921.The positive enthalpy change and positive entropy change in the binary extraction system show the endothermic process with an increase in entropy.Stripping of Zr（IV） from the loaded organic phase containing the mixture of TOA（0.1 M） and Cyanex 921（0.02 M） indicates that HNO3and Na2CO3are the best stripping agents.
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