| N1923从碱性氰化液中萃取金(Ⅰ)的研究 |
| Solvent Extraction of Gold from Alkaline Cyanide Solution by Primary Amine N1923 |
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| 摘要: 采用放射性同位素198Au示踪法研究了伯胺N1923和TBP从碱性氰化液中萃取金(Ⅰ),考察了酸化率、水相pH值、萃取剂浓度等对萃取率的影响,以及NaOH对载金有机相的反萃作用。结果表明,TBP含量大于20%,酸化的N1923与KAu(CN)2摩尔比值在1:1时,金能够完全被萃取。载金有机相可采用0.1mol·L-1的Na0H溶液定量反萃。机理研究表明,伯胺和TBP萃取Au(CN)2-,符合BC类 |
| 关键词: 溶剂萃取 N1923 KAu(CN)2 198Au同位素示踪法 |
| 基金项目: 云南省省校科技合作项目(No.B9808K). |
| Abstract: The solvent extraction of gold from alkaline cyanide solution by primary amine N1923 and Tri-butylphosphate (TBP) was described by 198Au radioactive tracer method.The influence of several variables such as acidification percentage, pHof raffinate solution, concentration of N1923, volume percentage of TBP were discussed.While volume percentage of TBP more than 20%, the ratio of acidificated N1923 and An(CN)- bigger than 1, the N1923 system can extract gold from alkaline cyanide solution completely.The combined ratio of N1923, TBP and An(CN)2- is 1:1:1 based on BC synergistic extraction mechanism。Aggregati o us are formed in the gold-loaded organic phase when gold concentration reaches 10g·L-1.The radius was measured by the dynamic laser scattering (DLS) method.The backward extraction by 0.1mol·L-1 NaOH system was also discussed. |
| Keywords: solvent extraction surfactant N1923 KAu(CN)2 labelled 198Au |
| 投稿时间：2001-01-20 修订日期：2001-04-02 |
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| 姜健准,周维金,高宏成,吴瑾光,徐光宪,陈景.N1923从碱性氰化液中萃取金(Ⅰ)的研究[J].无机化学学报,2001,17(3):343-348. |
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