ジヘキシルスルホキシドによる塩酸溶液からの2価の亜鉛およびカドミウムの液-液抽出

概要

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The extraction of divalent zinc and cadmium from aqueous solutions containing hydrochloric acid and / or lithium chloride has been carried out by using dihexyl sulphoxide (DHSO, R2SO) in benzene. The organic extracts were examined by Raman and nuclear magnetic resonance spectroscopies. As the results, it was found that the distribution coefficients rise with increasing the chloride ion concentration of aqueous solutions; the extraction efficiency of DHSO for zinc (II) is higher than that for cadmium(II) at [HCl] init aq ≤ 4mol dm-3, while its order becomes contrary above that acidity. The extraction of zinc(II) and cadmium (II) from hydrochloric acid solutions by DHSO is expressed by the following equilibrium equations: MCl2 (aq) + 2R2SO (org) ⇔ MCl2·2R2SO (org), MCl-3(aq) + H+ (aq) + 3R2SO (org)⇔HMCl3·3R2SO (org) and MCl2-4(aq) + 2H+ (aq) + 2R2SO (org)⇔H2MCl4·2R 2SO (org), where M = Zn or Cd.
社団法人資源・素材学会の論文
2000-01-25