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Extractive and sorption preconcentration of rhenium(VII) ions with the use of bis(diphenylphosphoryl)-substituted aza podand |
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| Authors: | A N Turanov V K Karandashev N A Bondarenko |
| Institution: | 1242. Institute of Solid-State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia 2242. Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia 3242. Research Institute of Highly Pure Chemical Substances and Chemicals, Bogorodskii val 3, Moscow, 107076, Russia |
| Abstract: | Interfacial distribution of trace amounts of ReO 4 ? ions between aqueous solutions of mineral acids and solutions of diphosphoryl-substituted aza podand Ph2P(O)CH2CH2OCH2CH2]2NBu (I) in dichloroethane was studied. The stoichiometry of extracted complexes was determined, the influence of HClO4, HNO3, HCl, and H2SO4 concentration in aqueous phase and the nature of organic solvent on the efficiency of transition of ReO 4 ? ions into organic phase was considered. Aza podand I shows larger extraction ability toward Re(VII) than monophosphorylated amines. The possibility of selective extraction and preconcentration of ReO 4 ? ions by a complex-forming sorbent obtained by the noncovalent binding of compound I on the surface of carbon nanotubes was shown. |
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