| 摘要 |
<p>Method and apparatus for effectively removing trace amounts of oxygen and/or nitrogen from impure argon are disclosed. Crude argon (10), such as that obtained from a cryogenic distillation unit for air is directed into a system wherein oxygen is first removed (11), e.g. electrolytically, and nitrogen is removed by contrast with a nitride forming metal (12). The metal nitride formed in the second stage of the purification process may be regenerated electrolytically by first forming an oxide of the metal to displace the nitrogen, then electrolytically removing the oxide to recover the base metal.</p> |
