Process for separating air by cryogenic distillation and installation for implementing this process
US7296437B2 · kind B2 · utility
1Cited by
10References
16Claims
0Family size
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Key dates
| Filing date | Feb 25, 2005 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Apr 27, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/903
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and an apparatus for separating air by cryogenic distillation. The apparatus has a medium pressure column thermally coupled to a low pressure column. Compressed and purified air is cooled to cryogenic temperature in an exchanger, and sent at least partly to the medium pressure column. Streams enriched in oxygen and nitrogen are sent from the medium pressure column to the low pressure column and, streams enriched in nitrogen and oxygen are removed from the low pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.