结晶紫-硫氰酸铵体系浮选分离钌(Ⅲ)

Separation of Ruthenium(Ⅲ) by Floatation as Its Ternary Association Complex with Crystal Violet and Ammonium Thiocyanate

在水溶液中Ru(Ⅲ)与硫氰酸铵、结晶紫形成不溶于水的三元缔合物,在少量氯化钠存在下,此三元缔合物沉淀浮于盐水相上层形成界面清晰的液-固两相。当溶液中氯化钠、硫氰酸铵、结晶紫的质量浓度分别为50 g.L-1、0.04 mol.L-1、2.5×10-4mol.L-1,pH 4.0时,Ru(Ⅲ)被定量浮选。Rh(Ⅲ)、Mn(Ⅱ)、Al(Ⅲ)、Ni(Ⅱ)、Cr(Ⅲ)、Cd(Ⅱ)、V(Ⅴ)、Fe(Ⅱ)离子在该体系中不被浮选,实现了Ru(Ⅲ)与这些离子的定量分离,对合成水样和纯镍中钌进行定量浮选分离测定。

In an acetate buffer of pH 4. 0, a water insoluble ternary association complex was formed among Ru（ Ⅲ ） crystal violet（CV） and ammonium thiocyanate in the presence of definite amount of sodium chloride, and the precipitate was floated above the aqueous phase giving a clear interface between liquid and solid phases. Quantitative floation of Ru（Ⅲ ） was achieved when the concentration of NaCl, NH4SCN and crystal violet attained to the following values respectively： 50 g· L^-1, 0.04 mol· L^-1 and 2. 5×10^-4mol · L^-1. Ruthenium（Ⅲ） was separated satisfactorily from Rh（Ⅲ）, Mn（ Ⅱ ）, Al（Ⅲ）, Ni（ Ⅱ ）, Cr（Ⅲ）, Cd（ Ⅱ ）, V（ Ⅴ ） and Fe（ Ⅱ ）, by this method, as the later elements were not floated by the reaction system mentioned above. The proposed method has been applied to the analysis of water and pure nickel.