Process and apparatus for producing nitrogen from air
US4966002A · kind A · utility
14Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Aug 11, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2250/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for the recovery of nitrogen from air in which gaseous air is compressed, cooled and optionally purified in a heat exchanger, and then distilled to obtain pure gaseous nitrogen overhead and an oxygen enriched liquid bottoms, wherein all of the bottoms and a portion of the overhead is passed to a condenser to form an oxygen enriched gas and liquid nitrogen and wherein at least a portion of the oxygen enriched gas is compressed and recycled to the distillation column to enhance recovery of the nitrogen product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.