Stripping of Au(I) from a Loaded Cetyltrimethylammonium Bromide/Tributyl Phosphate Organic Solution: Conversion and Reduction

Autor:	Jing Chen, Kun Huang, Qunyan Wei, Zhangjie Huang, Jinguang Wu, Xiangjun Yang
Rok vydání:	2008
Předmět:	Stripping (chemistry) Reducing agent General Chemical Engineering Extraction (chemistry) Inorganic chemistry General Chemistry Chloride Metal chemistry.chemical_compound chemistry Bromide Phase (matter) visual_art visual_art.visual_art_medium medicine Tributyl phosphate medicine.drug
Zdroj:	Solvent Extraction and Ion Exchange. 26:556-569
ISSN:	1532-2262 0736-6299
Popis:	The recovery of Au(I) from cyanide leaching solutions by solvent extraction techniques has attracted wide interest in the past decades. However, no substantial progress in industries has been reported yet, because of the difficulties concerning gold stripping from loaded organic phases, such as the quaternary amines extraction systems. In this work, a new technique for the recovery of Au(CN)2 − from the loaded cetyltrimethylammonium bromide / tributyl phosphate organic solution by a two‐step stripping procedure is suggested first by Au(CN)2 − conversion by HCl into corresponding chloride complex ions, and then by chemical reduction of auro‐chloride complex ions in TBP organic phases to give metal gold powder. The influences of HCl concentrations, reaction time, and various reducing agents used on the percent gold conversion and reduction were investigated. About 33% of Au(CN)2 − in the initial TBP organic phase could be precipitated as metal gold powder in the conversion step, while 67% was converted into...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ce885e51be28b45022067596c384cbd5 https://doi.org/10.1080/07366290802301549 Zobrazit plný text záznamu