十八烷基二甲基苄基氯化铵从碱性氰化液中固相萃取金的研究

Solid Phase Extraction Gold from Alkaline Cyanide Solution with Benzyl Dimethyl Stearyl Ammonium Chloride(BDMSAC)

基于十八烷基二甲基苄基氯化铵(BDMSAC)与Au(CN)-2络阴离子生成的离子缔合物可被C18反相键合硅胶固相萃取柱萃取、富集,建立了一种从碱性氰化液中高富集倍数固相萃取金的方法。该方法用于从碱性氰化液中固相萃取痕量金,萃取回收率可超过98%,同时研究了C18反向固相萃取金的机理,也创造性地提出了一种从碱性氰化液中提取金的新工艺。

The benzyl dimethyl stearyl ammonium chloride （BDMSAC） can react with Au （CN）2- to the ionic complex and the compound can be extracted quantitatively. At the same time, it can be enriched highly by solid phase extraction column of C18 reversed phase bonded silica gel. Therefore, a new method of extracting gold with high enrichment multiple was proposed. The method is used to extract trace amounts of gold from alkaline cyanide solution and the method of the re- covery rate of gold is higher than 98% under the optimal ex- perimental condition. The mechanism of C18 reverse solid phase extraction of gold was investigated and it also creatively put forward a new process of extracting gold from alkaline cy- anide solution.