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Title: DISTILLATION OF CALCIUM

Abstract

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.

Inventors:
Issue Date:
OSTI Identifier:
4307610
Patent Number(s):
2684898
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
NSA Number:
NSA-12-010249
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United States
Language:
English
Subject:
PATENTS; ALKALI METALS; CALCIUM; CONDENSERS; DISTILLATION; IMPURITIES; INERT GASES; MAGNESIUM; PATENT; PRESSURE; REFINING; SURFACES; TEMPERATURE; VAPORS

Citation Formats

Barton, J. DISTILLATION OF CALCIUM. United States: N. p., 1954. Web.
Barton, J. DISTILLATION OF CALCIUM. United States.
Barton, J. Tue . "DISTILLATION OF CALCIUM". United States.
@article{osti_4307610,
title = {DISTILLATION OF CALCIUM},
author = {Barton, J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1954},
month = {7}
}