双(正-辛基亚磺酰)乙烷溶剂萃取金及其应用

The Solvent Extraction of Gold with Bis (n- Octylsulphgine)ethane and Its Application

研究用双(正辛基亚磺酰)乙烷的乙酸丁酯溶液在盐酸介质中萃取金的性能.实验表明只有在KBr存在下于01～6mol/LHCl介质能定量萃取金,酸性硫脲溶液可将金定量反萃并用结晶紫分光光度法测定金.大量Fe3+,Cu2+,Ni2+,Sb(Ⅴ)等20余种贱金属和贵金属不干扰.斜率法、紫外和红外光谱研究萃合物组成和萃取机理.方法具有简便、准确、选择性高,可应用于矿物中微量金的测定.

The solvent extraction of gold from hydrochloric acid medium with bis( n octylsulphine)ethane(BOSE) in butylacetate was studied.The experimental results showed that gold(Ⅲ) can be quantitatively extracted from 0 1～6 mol/L hydrochloric acid in the presence of KBr.The gold in organic phase can reextracted by acidic thiourea solution.The spectrophotometric determinaiton of Au(Ⅲ) with crystal violet is applied subsequently.Common metal and noble metal ions did not interfere the extraction and the determination of Au(Ⅲ).The composition of extracted complex and the mechanism of the extraxtion of Au(Ⅲ) by means of slope method,ultraviolet absorption spectra and infrared spectra of BOSE itself and gold complex were discussed.It provides a rapid and high selective method for separation of Au(Ⅲ) from common and noble metal ions.The method was successfully applied to the determination of gold in ores.