Cryogenic air separation method for the production of oxygen and medium pressure nitrogen
US5074898A · kind A · utility
12Cited by
26References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Apr 3, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/94
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A cryogenic air separation method for the production of oxygen and medium pressure nitrogen comprising a primary higher pressure column and an auxiliary smaller lower pressure stripping column wherein primary column bottom liquid is employed as stripping column downflow liquid and primary column top vapor condenses against stripping column bottom liquid to generate stripping vapor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.