Nitrogen is produced at air separation plants by liquefaction of atmospheric air and separation of the nitrogen by distillation. The nitrogen is then recovered as a cryogenic liquid.
在空气分离工厂，通过空气液化和蒸馏分离出氮。接着氮作为低温液体回收。
2
Argon is produced by an air separation unit (ASU) through the liquefaction of atmospheric air and separation of the argon by continuous cryogenic distillation.
氩的生产使用空气分离装置(asu)，通过大气的液化和连续低温蒸馏分离出氩。
3
Comparing with gaseous air separation plant. Full liquid air separation plant and gas liquefaction plant need more cold for the whole process.