PSO-ⅢA(3)亚砜萃取金的性能及其机理

Extraction of gold by using PSO-ⅢA(3) sulfoxide and it's mechanism

本文研究了石油亚砜(PSO-Ⅱ型)中的组分PSO-Ⅲ(3)萃取Au(Ⅲ)时,稀释剂、酸度和亚砜浓度对萃取率的影响。元素分析法、斜率法测出萃合物组成为HAuCl_4·3PSO。根据红外光谱、紫外吸收光谱分析,认为萃取机理与水相酸度有关:在低酸度下为氧配位溶剂化机理,在高酸度下为酸性缔合机理。

Tervaleat Au was extracted as HAuCl4 by PSO-ⅢA(3)-a constituent of petroleum sulfoxide(ISO-type Ⅱ),and the effect of diluent,acidity and concentration ofsulfoxide on the extraction of Au was observed. The extractive composition was estimated to be HAuCl4·3PSO by elementary analysis and slope method. In terms of the results of infra-red spectrometry and ultraviolet absorption spectrometry the authors suggest the extraction mechanism to the acidity of water phase, under low acidity it shows oxygen-coordinated solvation; at high acidity it denotes acidic association mechanism.