| Extraction of Zr（IV） from hydrochloric acid with tri-octyl amine and Cyanex 921 in kerosene |
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| 作者姓名： | Bhikari Charan Bhatta Nandita Panda Sujata Mishra |
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| 作者单位： | [1]Department of Chemistry, College of Engineering and Technology, Biju Pattanaik University of Technology, Bhubaneswar-751003 Odisha, India [2]Department of Chemistry, Institute of Technical Education and Research, Siksha O Anusandhan Deemed to be University Bhubaneswar-751030, Odisha, India |
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| 摘 要： | This article reports the extraction of zirconium （IV） from aqueous HC1 solution by tri-octyl amine （TOA）, Cyanex 921, and their binary mixture using kerosene as the diluent. The effect 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 HC1 using the mixture of extractants containing 0.1 M TOA and 0.02 M Cyanex 921 in kerosene. Kerosene was found to be the effective 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 HNO3 and Na2CO3 are the best stripping agents.
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| 关 键 词： | Cyanex 混合萃取剂 三辛胺 Zr 煤油 盐酸 三辛基 二元混合物 |
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