真空蒸馏提纯硒利用元素的挥发性不同进行金属硒的提纯。
Purifying selenium by vacuum distillation. Metal selenium purification is on the base of different elemental volatility.
本文研究了金属镝、、的真空蒸馏提纯效果。
The purifcation of Dy, Ho and Er metals has been studied by the method of vacuum distillation.
然后给出了用真空蒸馏法制备高纯金属钪的新工艺，并对其提纯机制作了探讨。
Then the new technology in preparation of high purity scandium metal was proposed and its purification mechanism was discussed.
应用推荐