Method for capturing nitrogen from air using gas separation membrane
US5730780A · kind A · utility
22Cited by
30References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1993 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Oct 15, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2313/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention comprises an improved process for generating Nitrogen from air in which a vacuum is placed on the permeate side of a gas separation membrane, usually of the polysulfone type, resulting in highly enhanced flow rates and nitrogen purity sufficient for oil and gas pipeline repair use and for use in grain silos.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.