| 摘要 |
An improvement is provided in a process of separating air in a conventional double rectification column to produce oxygen and argon. In accordance with the invention, refrigeration is transfered to the oxygen-rich liquid conventionally formed in the higher pressure column from oxygen-poor liquid formed by condensing the oxygen-poor vapor formed in the higher pressure column. In addition, a portion of the oxygen-poor liquid is vaporized and either withdrawn as product or expanded in a turbine to provide refrigeration in the process.
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