INTEKFACIAL ACTIVITY OF 2-HYDH0XY-5-ALKYLBEKZALDEHYDE OXIMES AHD MECHANISM AND KINETICS OF COPPER EXTRACTION |
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| Authors: | D Sttjpnlak-Blniaklevicz J Szymanowski K Alejskl K Prochaska |
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| Affiliation: | Institute of Chemical Technology and Engineering, Technical, University of Poznari , PI. H.Sk ?odowskiej-Curie 2, poznari, 60-965, Poland |
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| Abstract: | Different adsorption isotherms such as the Gibbs, Szyszkowski,Frumkln and Temkin and polynomial were found as fits well to experimental interfacial tension isotherms for 2-hydroxy-5-alkylbenzaldehyde oximes at octane/water and xylene/water interfaces. The values of surface excess computed according to them increase as the length of the alkyl chain length increases for xylene/water system. Different behaviour was found at octane/water interface. The interfacial activity data were used to predict reaction orders against hydroxyoxime for different proposed mechanisms of copper extraction from acid sulphate solution.It was shown that an interfacial mechanism is very probable for compounds with long alkyl chains. For these compounds the extraction limiting step is the reaction between hydroxyoxime molecules present near the interface and the intermediate 1:1 complex. |
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| Keywords: | Cavitand nuclear waste extractions synergistic effect COSAN |
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