Production of nitrogen
US6257019A · kind A · utility
8Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Nitrogen is produced by separation of it from air. Nitrogen so separated is condensed. Most or all of the nitrogen is separated by rectification. At least some of the condensed nitrogen is employed as reflux in the rectification. The nitrogen is both separated and condensed at three or more different pressures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.