Cryogenic rectification system for producing nitrogen and ultra high purity oxygen
US5195324A · kind A · utility
10Cited by
11References
10Claims
0Family size
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Key dates
| Filing date | Mar 19, 1992 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Mar 19, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2250/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A cryogenic rectification system wherein bottoms from a single column nitrogen production system are used to produce ultra high purity oxygen in a two column purification system, and bottoms from the first purification column are employed to drive the nitrogen column top condenser to generate additional nitrogen column reflux.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.