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应用先转化后还原的方法对CTAB 30 %TBP载金有机相进行了反萃取研究 ,并以198Au作为示踪剂对有机相和水相中的Au(Ⅰ )进行检测。结果表明 :用浓度为 5 .90mol/L盐酸与载金有机相在带冷凝管的烧瓶中加热2h后 ,载金有机相中 33%左右的Au(Ⅰ )沉淀为金片析出 ,其余 6 7%的Au(Ⅰ )可能以 (AuCl2 ) -或 (Au(Cl) 4 ) -的氯配离子形式存在 ,被转化后的载金有机相可以用亚硫酸钠或草酸铵等直接还原 ,总反萃率可接近于 10 0 %。
The CTAB 30% TBP supported gold organic phase was stripped using the first reduction and reduction method. Au (Ⅰ) in the organic and aqueous phases was detected with 198Au as a tracer. The results showed that about 33% Au (Ⅰ) precipitated in the gold-bearing organic phase as gold flakes after heated for 2h in a condenser tube with a concentration of 5.90mol / L hydrochloric acid and the gold-loaded organic phase. The remaining 6 7 % Of Au (Ⅰ) may exist in the form of chloride ion of (AuCl 2) - or (Au (Cl) 4) -. The transformed gold-bearing organic phase can be directly reduced with sodium sulfite or ammonium oxalate and the total stripping ratio Can be close to 10 0%.