Mechanism of Gold Solvent Extraction from Alkaline Cyanide Solution by Surfactant CTMAB the Generation of the Third Phase

Acta Scientiarum Naturalium Universitatis Pekinensis

Mechanism of Gold Solvent Extraction from Alkaline Cyanide Solution by Surfactant CTMAB
the Generation of the Third Phase

YAN Wenfei¹, MA Gang¹, WENG Shifu¹, YAN Chunhua¹, ZHOU Weijin¹, GAO Hongcheng¹, LI Wenhong¹, WU Jinguang¹, XU Guangxian¹, CHEN Jing², HUANG Kun², YU Jianmin², CUI Ning²

¹State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, College of Chemistry and Molecular Engineering, Beijing, 100871; ²Institute of precious Metals, Kunming, 650221

Received:1999-07-15 Online:2000-07-20 Published:2000-07-20

表面活性剂从碱性氰化液中萃取金机理研究第三相的产生

闫文飞¹, 马刚¹, 翁诗甫¹, 严纯华¹, 周维金¹, 高宏成¹, 李维红¹, 吴瑾光¹, 徐光宪¹, 陈景², 黄昆², 余建民², 崔宁²

¹北京大学化学与分子工程学院，稀土材料化学及应用国家重点实验室，北京，100871; ²云南昆明贵金属研究所，昆明，650221

Abstract

Abstract: The solvent extraction of gold and the structure of the organic phase were studied by FTIR, ³¹P-NMR and the dynamic light scattering (DLS) spectroscopy. The results show that the water content and the size of the reversed micelles increased with the increase of gold content in the organic phase. The P═O stretching decreases, while the ³P signal shifts to upfield. The increase of the surfactant cation cause the generation of the third phase.

Key words: FTIR, ³¹P-NMR, CTMAB, DLS, reversed micelles

摘要： 利用Fourier变换红外光谱(FTIR)、核磁共振(³¹P-NMR)、激光光散射(DLS)等方法研究了萃取后负载金有机相的溶液结构。实验结果表明，随着有机相金浓度和表面活性剂浓度逐渐增加，有机相含水量增加，有机相中磷酸三丁酯(TBP)的磷氧基伸缩振动向低频移动，核磁共振(³¹P-NMR)的化学位移向高场移动；同时有机相中开始有直径16nm左右的聚集体形成；随着胶团逐渐长大，有机相分成两相即产生第三相；第三相中有直径4nm左右的胶团存在。

关键词: FTIR, ³¹P-NMR, CTMAB, DLS, 反向胶团

CLC Number:

O614.123

YAN Wenfei,MA Gang,WENG Shifu,YAN Chunhua,ZHOU Weijin,GAO Hongcheng,LI Wenhong,WU Jinguang,XU Guangxian,CHEN Jing,HUANG Kun,YU Jianmin,CUI Ning. Mechanism of Gold Solvent Extraction from Alkaline Cyanide Solution by Surfactant CTMAB
the Generation of the Third Phase[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

闫文飞, 马刚, 翁诗甫, 严纯华, 周维金, 高宏成, 李维红, 吴瑾光, 徐光宪, 陈景, 黄昆, 余建民, 崔宁. 表面活性剂从碱性氰化液中萃取金机理研究第三相的产生[J]. 北京大学学报（自然科学版）.

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