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提出了从 Pt,Pd,Rh 和 Ir 的混合物中纯化 Rh 的 P_(538)萃取法.首先将 Rh(Ⅲ)转化为水合阳离子,然后用 P_(538)的煤油溶液将其萃取到有机相,仍处于阴离子状态的 Pt,Pd 和 Ir 则留在水相.一次萃取 Rh 的直收率可达95%以上,Pt,Pd 和 Ir 的萃取率在1%以下.
A P_ (538) extraction method was proposed for the purification of Rh from a mixture of Pt, Pd, Rh and Ir. Rh (Ⅲ) was first converted to a hydrated cation, which was then extracted into an organic phase using P_ (538) Pt, Pd and Ir which remain in the anionic state remain in the aqueous phase, and the straight recovery of Rh in one extraction can reach more than 95%, and the extraction rates of Pt, Pd and Ir are below 1%.