高铼酸的制备研究

Study on Preparation of Perrhenic Acid

以高铼酸铵为原料,分别采用50%TBP+50%260#溶剂油萃取法和C160树脂离子交换—真空旋转蒸发二步法制备高铼酸。结果表明,采用上述两种方法均可制得符合行业标准YS/T 836—2012要求的Ⅰ级高铼酸产品,其中萃取法铼回收率为97.47%,NH4+去除率高达99.993%;离子交换法铼损失率为0.035%,C160阳离子树脂对NH4+的穿透吸附容量为33.6g/L。

Perrhenic acid was prepared by 50 % TBP＋ 50 % 260^# solvent extraction and two-step method of C160 resin ion exchange-vacuum rotary evaporation from ammonium perrhenate, respectively. The results show that perrhenic acid prepared by the above two processes meets the requirement of grade I of industry standard YS/T 836-2012. Recovery of Re is 97.47% with removal rate of NH4＋ of 99. 993% in solvent extraction process. Re loss rate is 0. 035% and penetrable adsorption capacity of NH4＋ with C160 cationic resin is 33.6 g/L in ion exchange process.