Process and installation for the production of gaseous oxygen under pressure
US5596885A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1995 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Apr 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/913
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air separation process of the "pumped" type, in which liquid oxygen is removed from a double distillation column and is pumped to a higher production pressure and then vaporized under that pressure. The incoming air is divided into several streams. A first stream is compressed to the medium pressure, cooled and sent to the double distillation column (7). A second stream is compressed above about 25 bars, but below its condensation pressure during vaporization of the liquid oxygen under pressure, then cooled to an intermediate temperature, at which a portion of the air continues its cooling and is liquified (in 20A), then expanded (in 21A) and sent to the double column, while the rest is work expanded (in 4). Use in large size installations for the production of oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.