| 摘要 |
<p>"CARBON DIOXIDE LIQUIFICATION SYSTEM" A carbon dioxide liquification system. Gaseous carbon dioxide containing at least one contaminating gas having a lower temperature of liquification than the gaseous carbon dioxide, such as oxygen or nitrogen, is bubbled through liquid carbon dioxide such that the gaseous substances undergo heat exchange with the liquid carbon dioxide. Sufficient heat exchange takes place so as to liquify the gaseous carbon dioxide but not sufficient to substantially liquify the contaminating gas. The contaminating gas is permitted to escape from the liquid carbon dioxide. Apparatus for practicing the present invention is also disclosed.</p> |
