Process and installation for producing nitrogen under pressure
US4717410A · kind A · utility
19Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Mar 6, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/913
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The rich liquid received at the base of the main column (3) at high pressure is expanded in two stages. After the first expansion to medium pressure, it is distilled so as to produce an addition of pure nitrogen. The second expansion achieves the reflux in the medium pressure column (4). Liquid nitrogen is pumped from this column to the high pressure column (3) and all the nitrogen can be produced at high pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.