Process and plant for separating air and producing ultra-pure oxygen
US4977746A · kind A · utility
13Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1990 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Jan 19, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/924
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Oxygen from the bottom of a low pressure column (4) is purified from hydrocarbons in a first auxiliary column (12), and the vapor at the top of this column is distilled in a second auxiliary column (17) heated at the base thereof with air at medium pressure. Ultra-pure oxygen is produced at the bottom of the second auxiliary column. Application in the production of ultra-pure oxygen for the electronic industry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.