| 摘要 |
Air separation, in particular apparatus and method for reducing the loss of krypton and xenon during air separation by cryogenic (low-temperature) distillation. The invention provides a method of separating air by cryogenic distillation, including forming a first liquid oxygen stream (from 18), and a second liquid oxygen stream (from 60) having a lower concentration of krypton and xenon than said first stream, withdrawing the second stream (44) as product, and subjecting the first stream (38) to further separation to enrich it in krypton and xenon. |
