论文部分内容阅读
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 p H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 ( )、铁 ( )、铜 ( )、镍 ( )、锌 ( )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 p H5～ 1 1范围内对 Au( CN) -2 有较高的萃取率和选择性 ,p H1/ 2 =1 1 .7,可用于碱性氰化液中金的萃取分离 .
We studied the extraction of gold from alkaline cyanide by polyalkylated branched secondary amines. The effects of equilibrium time, initial pH of aqueous phase, gold concentration, ionic strength, temperature, extractant concentration, diluent, On the extraction rate of gold, the extraction isotherms were drawn and the saturation capacity of gold was measured. The extraction performance of silver (), iron (), copper (), nickel () and zinc The separation factor of gold and these impurity elements was studied and the stripping of gold in loaded organic phase was studied.The results show that the extraction system has higher extraction rate and selectivity for Au (CN) -2 in the range of p H5 ~ Sex, p H1 / 2 = 1 1 .7, can be used for alkaline cyanide gold extraction and separation.