Abstract: The extraction of gold (Ⅰ) cyanide in polyethylene glycol-based aqueous biphasic systems has been investigated. Almost all of gold (Ⅰ) cyanide was transferred into the PEG-rich phase from salt-rich phase. No influence of solution pH on gold (Ⅰ) cyanide extraction was observed. The gold (Ⅰ) cyanide in the PEG-rich phase can be easily reduced by zinc. The PEG-rich phase could be reused for extraction of gold (Ⅰ) cyanide with no decrease of extraction capability. The aqueous biphasic systems may provide a new technique for gold separation from cyanide solutions.

摘要： 报道利用聚乙二醇（ＰＥＧ）／硫酸钠（Ｎａ２ＳＯ４）双水相体系从碱性氰化液中萃取分离金。实验考察初始水相 ｐＨ值，ＰＥＧ及 Ｎａ２ＳＯ４浓度等对 ＫＡｕ（Ｃ）２萃取影响。结果表明：富硫酸钠相（下相）的 ＫＡｕ（ＣＮ）。几乎全部转移到富 ＰＥＧ相（上相），且与ｐＨ值无关。随ＰＥＧ或Ｎａ２ＳＯ４浓度减小，金的分配系数减小。双水相萃取可能为金分离提供了一种新方法。