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研究了溴化十六烷基吡啶和KBr分离金(Ⅲ)的行为及与一些金属离子分离的条件。在水溶液中,Au(Ⅲ)与溴化十六烷基吡啶和KBr形成不溶于水的三元缔合物AuBr4-.CPB+,此三元缔合物沉淀浮于水相上层形成界面清晰的液-固两相。当溶液中溴化十六烷基吡啶和KBr的浓度分别为5.0×10-4mol/L和7.0×10-3mol/L时,Au(Ⅲ)可与Ce(Ⅳ),Ni(Ⅱ),Ru(Ⅲ),Cr(Ⅲ),Ga(Ⅲ),Rh(Ⅲ),Co(Ⅱ),Fe(Ⅲ),Zn(Ⅱ),Cu(Ⅱ),Al(Ⅲ),Sn(Ⅳ)和V(Ⅴ)进行分离,对合成水样中的Au(Ⅲ)进行了分离和测定,Au(Ⅲ)的浮选率达到99.8%以上,其他金属离子的浮选率都在3.3%以下。
The behavior of separation of gold (Ⅲ) by cetyl pyridinium bromide and KBr and the separation conditions from some metal ions were studied. In aqueous solution, Au (Ⅲ) and cetyl pyridinium bromide and KBr form a water-insoluble ternary association AuBr4-.CPB +, the ternary association precipitate floating in the water phase to form a clear interface of the liquid - solid two-phase. When the concentration of cetyl pyridinium bromide and KBr in solution is 5.0 × 10-4 mol / L and 7.0 × 10-3 mol / L, Au (Ⅲ) can react with Ce (Ⅳ), Ni (Ⅱ), Ru (Ⅲ), Ga (Ⅲ), Rh (Ⅲ), Co (Ⅱ), Fe Ⅲ, Zn Ⅱ, Cu Ⅱ, Al Ⅲ, Sn and V (Ⅲ) was separated and determined. The flotation rate of Au (Ⅲ) was above 99.8%, and the flotation rates of other metal ions were below 3.3%.