Citation: Jian Zhun JIANG, Wei Hong LI, Wei Jin ZHOU, Hong Cheng GAO, Jin Guang WU, Guang Xian XU. Investigation on the Extraction Mechanism of Au (I) from Cyanide Solution with Quaternary Ammonium System[J]. Chinese Chemical Letters, ;2003, 14(4): 397-400. shu

Investigation on the Extraction Mechanism of Au (I) from Cyanide Solution with Quaternary Ammonium System

Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871

Received Date: 24 May 2002

Fund Project: The authors want to express thanks to the National Natural Science Foundation of China (No.20023005) for financial support.

The mechanism of Au (I) extraction has been characterized using ¹⁹⁸Au radiometry, thermodynamic equilibrium, Karl-Fischer titration and FT-IR spectroscopy techniques. The results indicate that the extraction follows ionic combination and solvent interaction mechanism. The stoichiometry of the extracted species is 1:1:4:4 for TDMBA⁺:Au(CN)₂^-:TBP:H₂O. The microstructure model of the extracted complex is a supramolecular structure via hydrogen bonding, ion dipole interaction and ionic combination. The extraction process can be described as micelles in the aqueous phase transfer into the organic phase and reversed micelles or microemulsion (W/O) form in the organic phase.
- Solvent extraction,
- Au(CN)₂^-,
- FT-IR,
- tetradecyldimethylbenzylammonium chloride (TDMBAC)
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