DISTILLATION OF CALCIUM
This invention relates to an improvement in the process for the purification of caicium or magnesium containing an alkali metal as impurity, which comprises distiiling a batch of the mixture in two stages, the first stage distillation being carried out in the presence of an inert gas at an absolute pressure substantially greater than the vapor pressure of calcium or maguesium at the temperature of distillation, but less than the vaper pressure at that temperature of the alkali metal impurity so that only the alkali metal is vaporized and condensed on a condensing surface. A second stage distilso that substantially only the calcium or magnesium distills under its own vapor pressure only and condenses in solid form on a lower condensing surface.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-12-010249
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 2684898
- OSTI ID:
- 4307610
- Country of Publication:
- United States
- Language:
- English
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