查找使用阿拉丁产品的科研文献

Separation of zirconium from hafnium in sulfate medium using solvent extraction with a new reagent BEAP

She Chen,Zhifeng Zhang,Shengting Kuang,Yanling Li,Xiaowen Huang,Wuping Liao

A new extractant, bis(2-ethylhexyl)-1-(2-ethylhexylamino)propylphosphonate (BEAP or B) was synthesized to extract and separate zirconium and hafnium from sulfate medium. Under optimum conditions, the separation factor of Zr over Hf was found to be 6.8. The extracted complexes were determined to be ZrO(HSO 4 ) 2 ·3B and HfO(HSO 4 ) 2 ·2B. The extractions of zirconium and hafnium are both exothermic. A counter-current operation was conducted, in which the content of HfO 2 was decreased from 3% to 0.6% in the ZrO 2 product. It is suggested that much more extraction and scrubbing stages are needed to reach the goal of 0.01% HfO 2 in ZrO 2 product.