Method and apparatus for producing gaseous oxygen
US5794458A · kind A · utility
2Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1997 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jan 30, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/901
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for making gaseous oxygen at a delivery pressure in a single column oxygen generator. In accordance with the method and apparatus, a column bottoms stream composed of the product is pumped to the delivery pressure and then vaporized. A liquid coolant stream used in condensing reflux is recompressed by a recycle compressor and then recycled back into the bottom of the column. Such recycled stream has a higher nitrogen content than the column bottoms. Part of the nitrogen tower overhead, not used in forming the reflux, is turbo-expanded by a turbo-expander coupled to the recycle compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.