| Degradation of Lix984N and its effect on interfacial emulsion |
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| 作者姓名： | 刘晓荣 邱冠周 胡岳华 |
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| 作者单位： | [1]Department of Materials Engineering, Shanghai Institute of Technology, Shanghai 200233, China [2]School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China |
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| 基金项目： | 上海先进学院校科研和教改项目 |
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| 摘 要： | 1 INTRODUCTION Interfacial cruds are supposed to be one of the commonest and most troublesome problems emerging out in practice of copper solvent extraction. Generally, interfacial cruds are inhomogeneous oil/water emulsions that consist of organic phase, aqueous phase and solid particles. It can lead to a lot of detrimental effects on plant operations including difficult phase disengagement, contaminated electrolytes, extractant loss, declined product quality and polluted environment. Lo…
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| 关 键 词： | 炼铜 溶剂萃取 界面杂质 乳液形成 降解方法 Lix984N |
| 收稿时间： | 2006-05-09 |
| 修稿时间： | 2006-07-09 |
Degradation of Lix984N and its effect on interfacial emulsion |
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| Liu Xiao-rong , Qiu Guan-zhou and Hu Yue-hua.Degradation of Lix984N and its effect on interfacial emulsion[J].Journal of Central South University of Technology,2006,13(6):668-672. |
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| Authors: | Liu Xiao-rong Qiu Guan-zhou and Hu Yue-hua |
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| Affiliation: | (1) Department of Materials Engineering, Shanghai Institute of Technology, Shanghai, 200233, China;(2) School of Resources Processing and Bioengineering, Central South University, Changsha, 410083, China |
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| Abstract: | The organic phase separated from the interfacial crud provided by Dexing copper mine in Jiangxi, China, was analyzed by combined gas chromatography-mass spectroscopy. The results show that many kinds of emphiphiles containing such hydrophilic groups as carbonyl, carboxyl, sulphonyl or acylamine exist in organic phase. Conclusively, Lix984N would degrade gradually during a long-term contact with the acidic aqueous feed and strip reagents. Lix84 and nonylphenol as effective components of Lix984N degraded almost completely after long-term recycling. Lix984N degraded through such reactions as Beck.mann rearrange, hydrolysis and sulphofication. The degradation of Lix984N would deteriorate solvent extraction and disengagement performance, and result in a more stable interracial emulsion. |
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| Keywords: | interfacial emulsion degradation Lix984N copper solvent extraction |
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