Abstract: The vacuum separation of Pb-Pt alloy was studied. Theoretical analyses show that Pb-Pt alloy could be separated by vacuum distillation. The effects of distillation temperature, distillation time and pressure on the vacuum separation were studied. The results show that the removal rate of Pb was more than 99.88% and Pt content in residues was higher than 99% when the Pb-Pt alloy containing 2.5%~15%(w) Pt was distilled for 3 h at 1250 K and 30 Pa. This method has advantages such as short process flow chart, high efficiency and no pollution to the environment.

Key words: vacuum distillation, separation, Pb-Pt alloy

摘要： 从理论上分析了真空蒸馏分离Pb-Pt合金的可行性，并实验考察了蒸馏温度、蒸馏时间、真空度等因素对Pb-Pt合金分离效果的影响. 结果表明，在蒸馏温度1250 K、真空度30 Pa、蒸馏时间3 h的条件下，含Pt 2.5%~15%(w)的Pb-Pt合金一次蒸馏后，Pb脱除率大于99.88%，Pt的纯度可富集至99%以上. 真空蒸馏方法可有效分离Pb-Pt合金，直接得到纯金属Pb，并可得到较纯的金属Pt，具有工艺流程短、简单高效、无污染等特点.

关键词: 真空蒸馏, 分离, 铅铂合金