摘要
研究表明石油亚矾在硫脲浸金液中萃金属于中性络合溶剂化机理。萃合物的组成为Au[SC(NH_2)_2)_2^+·1/2SO_4^(2-)·3PSO。石油亚砜通过亚砜基上硫原子与金(Ⅰ)配位。
The mechanism of gold(L) extraction by petroleum sulfoxides (PSO) from gold (Ⅰ)-thiourea leaching solution has been investigated. The results indicated that the reaction is neutral solvent complexing extraction, when the concentration of PSO>1 mol·L^(-1), the composition of extraction complex is shown to be Au[SC(NH_2)_2]_2(1/2)SO_4·3PSO. The IR spectra of the PSO before and after extraction were compared. The results shown that Au(Ⅰ) is coordinated with S atom in>S=O group. The following extraction reaction is proposed:Au[SC(NH_2)_2]_2^++1/2SO4_^(2-)+3PSO=Au[SC(NH_2)_2]^+_+2·1/2SO_4^(2-)·3PSO
出处
《贵金属》
CAS
CSCD
北大核心
1991年第1期1-6,共6页
Precious Metals
关键词
金
溶剂
萃取
亚砜
硫脲
Gold, Solvent extraction, Sulfoxide, Thioureas
