Process and system for the production of dry, high purity nitrogen
US4931070A · kind A · utility
99Cited by
21References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 12, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | May 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2210/001
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
High purity nitrogen from an air separation membrane/deoxo system is dried in a membrane dryer unit preferably operated with a countercurrent flow path in the membrane bundle. Drying is enhanced by the use of purge gas on the permeate side of the membrane dryer unit, with feed air, product nitrogen or waste gas from the air separation membrane system being used as purge gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.