Process or apparatus for distilling air and application in feeding gas to a steel mill
US5291737A · kind A · utility
13Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Jul 31, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/939
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The apparatus is of the type having a double column and a mixing column. The latter is fed at the bottom portion with auxiliary air that is compressed at a pressure different from that of the mean pressure column, and at the top by means of a liquid withdrawn from the bottom of the low pressure column and pumped at the same pressure as the auxiliary air. Impure oxygen is withdrawn at the top of the mixing column as production gas, and substantially pure oxygen is produced at the bottom of the low pressure column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.