发明授权
US5373699A Process for the production of nitrogen by cryogenic distillation of atmospheric air 失效
通过大气空气的低温蒸馏生产氮气的方法

Process for the production of nitrogen by cryogenic distillation of
atmospheric air
摘要:
An air separation process wherein a nitrogen enriched fraction is withdrawn from the distillation column, a portion of which is compressed and recycled through the lowest positioned reboiler in the column and directed to an upper portion of the column as reflux.
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