- 作者: S. N. Duche, D. V. Chavan and P. M. Dhadke*
- 作者服務機構: Inorganic Chemistry Laboratory, Applied Chemistry Division, Department of Chemical Technology, University of Mumbai, Matunga, Mumbai - 400 019, India
- 中文摘要: The extraction of Rh(III) from bromide media with Cyanex-923 and Cyanex-471X in toluene was studied. The quantitative extraction of Rh(III) with extractants was found by studying the different parameters like, hydrobromic acid concentration, extractant concentration, diluents and effect of temperature on extraction. The optimum condition was [HBr] = 1.0-1.5 mol l-1, [SnCl2] = 0.2 mol l-1 with [Cyanex-923] = 0.15 mol l-1, while it was [HBr] = 1.5-2.0 mol l-1, [SnCl2] = 0.4 mol l-1 with [Cyanex-471X] = 0.8 mol l-1 in toluene. The quantitative extraction was observed only in the presence of SnCl2 for both extractants. The complete recovery of Rh(III) from the Cyanex-923 extracted organic phase was observed with the 1:1 mixture of (4.0 mol l-1 HCl + 2.0 mol l-1 HNO3), and that with the Cyanex-471X extracted organic phase was found with 1:1 mixture of (2.0 mol l-1 H2SO4 + 1.0 mol l-1 KMnO4). Stoichiometric ratio of Rh(III) with both extractants was 1:1. The proposed methods were employed for extraction and separation of Rh(III) from other platinum metal ions and also for recovery of Rh(III) from a synthetic solution of spent autocatalysts.
- 英文摘要: --
- 中文關鍵字: Rhodium(III); Cyanex-471X; Cyanex-923; Separation; Recovery; Spent autocatalyst.
- 英文關鍵字: Rhodium(III); Cyanex-471X; Cyanex-923; Separation; Recovery; Spent autocatalyst.