Membrane system for intermittent gas separation
US4421529A · kind A · utility
44Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1982 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Jul 2, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2210/0046
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved process for separating gases using a hollow fiber membrane on an intermittent basis is described. It has been found that if the pressure on the feed side of the membrane is maintained essentially constant or is allowed to vary slowly during operation and in the periods between operating cycles the useful lifetime of the separation device is greatly extended. This process is particularly useful for the separation of air into oxygen- and nitrogen-enriched streams using hollow fibers melt spun from poly(4-methylpentene-1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.