Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

• Published in: Rare metals 2016-03, Vol.35 (3), p.282-288
• Main Authors: Xie, Run-Fang, Hu, Qiu-Fen, Yang, Guang-Yu, Chen, Jing, Han, Yun-Shan, Zhao, Yong-He, Li, Zhen
• Format: Article
• Language: English
• Subjects: Ammonium bromides; Ammonium chloride; Ammonium chlorides; Biomaterials; Chemical bonds; Chemistry and Materials Science; Chloride; Chlorides; Cyanide process; Dimethyl; Energy; Feature extraction; Gold; Liquid-liquid extraction; Materials Engineering; Materials Science; Metallic Materials; Nanoscale Science and Technology; Organic compounds; Physical Chemistry; Pyridines; Silica gel; Solid phases; Surfactants; 十六烷基三甲基溴化铵; 固相萃取柱; 季铵盐表面活性剂; 提取技术; 氰化; 溴化十六烷基吡啶; 溶液; 碱性
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-014-0323-2

The solid-phase extraction（SPE） technique applied to the extraction of organic compound was creatively used as the extraction of inorganic gold in the paper.Two types of techniques were proposed and explored,namely the SPE and the liquid–liquid extraction（LLE） of the quaternary ammonium surfactant [cetytrimethyl ammonium bromide（CTMAB）,cetyl pyridine bromide（CPB）,benzyl dimethyl dodecyl ammonium chloride（BDMDAC）,and dodecyl trimethyl ammonium chloride（DTMAC）].The surfactant could react with Au（CN）2^- to form the ionic complex,and the compound could be extracted by SPE column of reversed-phase bonded silica gel.Hence,a new method of SPE was proposed to extract gold with these features of the high selectivity,the reliability,and the simplicity.The experimental result shows that the recovery rate of gold is more than 98 %,and the solid-phase extraction column is not easily damaged and it can be repeatedly used.The new method can be used as the extraction process of gold from alkaline cyanide solution as well.Besides,the paper also puts forward a new process of gold extraction.