High purity nitrogen PSA utilizing controlled internal flows
US5441558A · kind A · utility
19Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Aug 9, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/402
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is a nitrogen pressure swing adsorption process for separating gas mixtures containing nitrogen and oxygen, such as air, using a unique gas transfer process step, continuous feed gas introduction and an appropriate isolation step with continued product purge/repressurization to achieve high purity nitrogen product of 99.9% or greater by volume nitrogen, preferably 99.99% or greater by volume of nitrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.