Abstract: The basic rule of vacuum distillation of Pb-Pd alloy was investigated. The primary distillation results show that the removal rate of Pb was close to 92.5% and the Pd content in the primary distillation residue remained at about 60% when the Pb-Pd alloy containing 10%(w) Pd was distillated for more than 4 h at 1250 K and 35 Pa. After the secondary distillation at 1523 K, the Pd content in the secondary residue was still maintained at about 60%. In the vacuum distillation process of Pb-Pd alloy, most of Pb could be separated and collected as metallic Pb, while Pd was enriched in the residue. As a result, the material amount of further treatment for extraction of Pd was reduced remarkably by this method.

Key words: vacuum distillation, separation, enrichment, Pb-Pd alloy

摘要： 研究了Pb-Pd合金真空蒸馏的基本规律. 结果表明，含Pd 10%(w)的Pb-Pd合金在1250 K及35 Pa条件下进行一次蒸馏，蒸馏时间延长至4 h后Pb脱除率接近定值(92.5%)，一次蒸余物中的Pd含量保持在60%左右. 将一次蒸余物在1523 K下进行二次蒸馏，所得二次蒸余物中Pd含量仍保持在60%左右. 真空蒸馏工艺处理Pb-Pd合金，将大量Pb脱除并直接得到纯金属Pb，同时富集了Pd，减少了后续提Pd工艺的处理量.

关键词: 真空蒸馏, 分离, 富集, Pb-Pd合金