Extraction Equilibria of Aluminum and Beryllium from Sulfate Media by Mixture of Bis(2-Ethylhexyl) Phosphoric Acid and Dinonylnaphthalene Sulfonic Acid.
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概要
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The equilibria of aluminum and beryllium extraction from sulfate media are using single systems of bis(2ethylhexyl) phosphoric acid (D2EHPA) and dinonylnaphthalene sulfonic acid (DNNSA), and also the mixed system of these extractants have been studied. In the single D2EHPA system, the extraction species are found to be <span style="text-decoration: overline;">AIR</span><SUB>3</SUB><span style="text-decoration: overline;">·HR</span> and <span style="text-decoration: overline;">BeR</span><SUB>2</SUB><span style="text-decoration: overline;">·2HR</span> and separation of the two metals is satisfactory, although the extraction rate is rather slow. In the single DNNSA system, the DNNSA is found to form reverse micelles at concentrations greater than 10<SUP>–5</SUP> M. Separation is poor and the extraction mechanism of the metal ions is influenced by sodium ion.<BR>The presence of D2EHPA increases the critical micelle concentration (CMC) of DNNSA. For DNNSA concentrations below the CMC, the extraction mechanism in the mixed system is identical to that for the single D2EHPA system. For DNNSA concentrations greater than the CMC in the mixed system, the distribution ratio increases and separation of the metals becomes more difficult. This type of synergistic effect appears to be caused by inclusion of D2EHPA molecules in the DNNSA micelles.
- The Society of Chemical Engineers, Japanの論文
著者
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Mashimo Miki
Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka Univer
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Komasawa Isao
Department Of Chemical Engineering Faculty Of Engineering Science Osaka University
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Sato Hiroshi
Department Of Anatomy And Developmental Neurobiology Institute Of Health Biosciences The University
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Ueda Makoto
Department Of Applied Physics Faculty Of Engineering Nagoya University
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Ueda Makoto
Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University
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Mashimo Miki
Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University
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