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

YAN Wenfei, MA Gang, WENG Shifu, YAN Chunhua, ZHOU Weijin,
GAO Hongcheng, LI Wenhong, WU Jinguang, XU Guangxian

(State Key Laboratory of Rare Earth Materials Chemistry and Applications,Peking University,College of Chemistry and Molecular Engineering,Beijing,100871)

CHEN Jing, HUANG Kun, YU Jianmin, CUI Ning

(Institute of precious Metals, Kunming, 650221)


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¨TO 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

(R.D. 1999-07-15 P.D. 2000-07-20 Vol.36 No.4 pp.461¡ª467)



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