Production of ultra-high purity oxygen from cryogenic air separation plants
US5049173A · kind A · utility
30Cited by
17References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Mar 6, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/939
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to an improvement for the production of ultra-high purity oxygen from cryogenic air separation processes which produce nitrogen and/or commercial purity oxygen products. In particular, the improvement comprises removing or producing an oxygen-containing but heavy contaminant-lean (free, stream from one of the distillation columns of a single or multiple column cryogenic air separation facility and further stripping the removed or produced oxygen-containing stream in a fractionator to produce ultra-high purity oxygen (i.e., contaminant concentration <10 vppm).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.