在分析真空蒸馏的同时将区域提纯进行了理论分析，证明利用区域提纯技术可以在真空提纯的基础上制备纯度更高的金属锑。

Then the zone refine is also discussed, and shows that zone refine can produce higher purity antimony on the basis of vacuum distillation.

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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.

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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.

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