Extraction separation of germanium with potassium iodide-1propanol-germanium ternary complex
HAN Jintu 1, SI Xuezhi 2, ZHANG Huijie 1, MA Wanshan*1
1College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China; 2College of Chemistry and Chemical Engineering， Henan University of Technology, Zhengzhou 450052, China
Abstract：The extraction and separation behaviors of germanium by potassium iodide-1propanol-germanium complex and the separation conditions of some metal ions were studied.The results showed that sodium chloride could separate the 1propanol aqueous solution into two phases.In phase separation process,the complex［GeI2-6］［C3H7OH+2］2 formed from GeI2-6 (which was generated from germanium and potassium iodide) and protonized 1propanol (C3H7OH+2) could be fully extracted by 1propanol phase.The extraction rate of germanium was higher than 98.4% when the concentrations of 1propanol,potassium iodide and sodium chloride were 30%(V/V),8.0×10-3 mol/L and 0.20 g/mL,respectively.Meanwhile,Zn2+,Fe2+,Mg2+,Ni2+,Co2+,Mn2+,Ag+,Al3+ and Cr3+ could not be extracted,realizing the separation of germanium from these metal ions.
