Study on extraction separation of antimony（Ⅲ）by n-propyl alcohol-potassium iodide-ammonium sulfate system in the presence of ascorbic acid
GUO Peng1, SI Xue-zhi2, NIU Yuan-yuan1, ZHONG Li1
1.College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China; 2.College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450052, China
Abstract：The behavior and conditions of extraction separation and concentration of Sb（Ⅲ） from other metal ions by n-propyl alcohol-potassium iodide-ammonium sulfate system in the presence of ascorbic acid were investigated. The results showed that n-propyl alcohol aqueous solution could be well divided into two phases when ammonia sulfate was added. The complex ［SbI4-］［C3H7OH2+］ formed by SbI4- (the reaction product of Sb（Ⅲ） with potassium iodide) and protonized n-propyl alcohol (C3H7OH2+) could be fully extracted by n-propyl alcohol phase in phase separation process. When the system contained 0.40 mol/L potassium iodide, 0.2 g/mL ammonia sulfate and 30% n-propyl alcohol (V/V), Sb（Ⅲ） was well separated from Pb（Ⅱ），Mn（Ⅱ），Fe（Ⅲ），Zn（Ⅱ），Al（Ⅱ），Cr（Ⅲ），Ni（Ⅱ），Cu（Ⅱ） and Mg（Ⅱ）, and the extraction recoveries of Sb（Ⅲ） was over 96.9%.
郭鹏，司学芝，牛媛媛，钟黎. 在抗坏血酸存在下正丙醇-碘化钾-硫酸铵体系萃取分离锑（Ⅲ）的研究[J]. 冶金分析, 2011, 31(12): 71-74.
GUO Peng, SI Xue-zhi, NIU Yuan-yuan, ZHONG Li. Study on extraction separation of antimony（Ⅲ）by n-propyl alcohol-potassium iodide-ammonium sulfate system in the presence of ascorbic acid. , 2011, 31(12): 71-74.
