Degradation of Lix984N and its effect on interfacial emulsion

来源期刊：中南大学学报(英文版)2006年第6期

论文作者：刘晓荣 邱冠周 胡岳华

文章页码：668 - 672

Key words：interfacial emulsion;degradation;Lix984N;copper solvent extraction

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 Beckmann rearrange,hydrolysis and sulphofication.The degradation of Lix984N would deteriorate solvent extraction and disengagement performance,and result in a more stable interfacial emulsion.