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Mechanism of gold solvent extraction from aurocyanide solution by quaternary amines: models of extracting species based on hydrogen bonding 被引量:1

Mechanism of gold solvent extraction from aurocyanide solution by quaternary amines: models of extracting species based on hydrogen bonding
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摘要 The mechanism of gold solvent extraction from KAu(CN)2 solution was investigated by means of FTIR, EXAFS, ICP and radioactive tracer methods. Two extraction systems were studied, namely N263-tributyl phosphate(TBP)-n-dodecane and N263-iso-octanol-n-dodecane. High-resolution FT IR spectroscopy indicated that the CN stretching vibrations of the two extraction systems differred greatly. In order to interpret the significant difference in CN stretching vibrations, twoextracting species models are proposed——supramolecular structures based on the formation ofhydrogen bonds between Au(CN)2- and modifiers such as TBP and iso-octanol. The mechanism of gold solvent extraction from KAu(CN)2 solution was investigated by means of FTIR, EXAFS, ICP and radioactive tracer methods. Two extraction systems were studied, namely N263-tributyl phosphate(TBP)-n-dodecane and N263-iso-octanol-n-dodecane. High-resolution FT IR spectroscopy indicated that the CN stretching vibrations of the two extraction systems differred greatly. In order to interpret the significant difference in CN stretching vibrations, two extracting species models are proposed—supramolecular structures based on the formation of hydrogen bonds between Au(CN)2- and modifiers such as TBP and iso-octanol.
出处 《Science China Chemistry》 SCIE EI CAS 2000年第2期169-177,共9页 中国科学(化学英文版)
基金 We thank BSRE Lab for EXAFS measurement.This work was supported by the Collaboration Project of Yunnan Province and Peking University,the State Key Project for Fundamental Research of MOST and the National Natural Science Foundation of China(Grant No.199
关键词 GOLD extraction hydrogen bonding FT IR. gold extraction hydrogen bonding FT IR
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  • 1Naifu Zhou,Jinguang Wu,Zhijian Yu,R. D. Neuman,Dujin Wang,Guangxian Xu.Investigation of aggregation in solvent extraction of lanthanides by acidic extractants (organophosphorus and naphthenic acid)[J].Science in China Series B: Chemistry.1997(1)

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