Process for the production of nitrogen by cryogenic distillation of atmospheric air
US5373699A · kind A · utility
6Cited by
5References
23Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 8, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Oct 8, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/939
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air separation process wherein a nitrogen enriched fraction is withdrawn from the distillation column, a portion of which is compressed and recycled through the lowest positioned reboiler in the column and directed to an upper portion of the column as reflux.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.