研究了多烷基支链仲胺从碱性氰化液中萃取金，考察了平衡时间、水相初始pH值、金浓度、离子强度、温度、萃取剂浓度、稀释剂、相比等因素对金萃取率的影响，绘制了萃取等温线，测定了金的饱和容量，考察了萃取体系对银(Ⅰ)、铁(Ⅱ)、铜(Ⅰ)、镍(Ⅱ)、锌(Ⅱ)的萃取性能，计算出了金与这些杂质元素的分离系数，研究了负载有机相中金的反萃.结果表明，该萃取体系在pH 5～11范围内对Au(cN)2-有较高的萃取率和选择性，pH1／2=11.7，可用于碱性氰化液中金的萃取分离.
The extraction of gold from alkaline cyanide solution by alkyl-substituted secondary aminehas been investigated. The effects of several variables, such as equilibrium time, temperature, dilu-ent, extractant concentration, pH, gold concentration, ionic strength of the aqueous phase and phaseratio (O/A) on the extraction yield are discussed. The extraction isotherm, saturation capacity, sepa-ration coefficients of gold to silver(I), ferrous(Ⅱ), copper( I ), nickel( Ⅱ ), zinc(Ⅱ) have been de-termined respectively. Stripping extraction of gold from loaded organic phase has also been studied.The results showed that the system consisted of 0. 1％ (volume fraction) secondary amine (7203)-0. 05％(volume action)ROH-n-dodecane gave high extraction yield and selectivity for Au (CN)2-atpH1/2=11.7.
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