Method and apparatus for producing high-purity nitrogen and low-purity oxygen
US11988446B2 · kind B2 · utility
0Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2021 |
| Grant date | May 21, 2024 |
| Priority date | — |
| Expiry date | Mar 17, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2245/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for producing high-purity nitrogen and low-purity oxygen using three-column rectification are provided, in which: nitrogen and oxygen undergo rectification in different columns, with high-purity nitrogen and low-purity oxygen being separated out of air simultaneously, thereby overcoming the shortcomings of conventional low-purity oxygen production equipment, and also reducing equipment investment, lowering energy consumption, increasing product added value, and realizing a circular economy effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.