四丁基溴化铵-碘化钾-金(Ⅲ)三元缔合物浮选分离金的研究

来源期刊：冶金分析2010年第6期

论文作者：牛明改 李玉玲 曹书勤 涂静 马万山

文章页码：73 - 76

关键词：金(Ⅲ)； 四丁基溴化铵； 碘化钾； 浮选分离

Key words：gold (Ⅲ)； tetrabutyl ammonium bromide； potassium iodide； floatation separation

摘    要：在水溶液中,Au(Ⅲ)与四丁基溴化铵和碘化钾形成不溶于水的三元缔合物AuI₄^-·TBAB⁺,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。当硫酸铵、四丁基溴化铵和碘化钾的浓度分别为0.1g/mL、7.0×10^-4 mol/L和4.0×10^-3 mol/L时,Au(Ⅲ)可与Mg(Ⅱ)、W(Ⅵ)、Zr(Ⅳ)、Ni(Ⅱ)、Mo(Ⅵ)、Rh(Ⅲ)、U(Ⅵ)、V(Ⅴ)、Cr(Ⅲ)、Mn(Ⅱ)、Ga(Ⅲ)、Al(Ⅲ)、Fe(Ⅱ)、Zn(Ⅱ)、Co(Ⅱ)、Ce(Ⅲ)和Sn(Ⅳ)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98.6%以上,而其他金属离子的浮选率都在2.9%以下。该方法在微量金的分离和富集分析中有一定的实用价值。

Abstract: In aqueous solution, gold (Ⅲ)) could form a water-insoluble ternary complex (AuI₄^-·TBAB⁺) with tetrabutyl ammonium bromide and potassium iodide. The ternary complex could float well on the surface of water phase, making the solution form a liquid-solid phase with a clear interface. When the concentrations of (NH₄)₂SO₄, tetrabutyl ammonium bromide and KI in the solution were 0.1 g/mL,7.0×10^-4 mol/L and 4.0×10^-3 mol/L respectively, Au(Ⅲ) could be separated from Mg(Ⅱ), W(Ⅵ), Zr(Ⅳ), N(Ⅱ), Mo(Ⅵ), Rh(Ⅲ), U(Ⅵ), V(Ⅴ), Cr(Ⅲ), Mn(Ⅱ), Ga(Ⅲ), Al(Ⅲ), Fe(Ⅱ), Zn(Ⅱ), Co(Ⅱ), Ce(Ⅲ) and Sn(Ⅳ). This method has been applied to the separation and determination of Au(Ⅲ) in synthetic water sample, and the floatation rate of Au(Ⅲ) was up to 98.6%, while the floatation rates of other metal ions were less than 2.9%. This method had certain utility value in the separation and enrichment of micro gold.